diff --git a/Services/PeriodExamService.cs b/Services/PeriodExamService.cs
index 544cfc9..c3f5eac 100644
--- a/Services/PeriodExamService.cs
+++ b/Services/PeriodExamService.cs
@@ -692,19 +692,19 @@ namespace BMA.EHR.Recurit.Exam.Service.Services
                                 .OrderByDescending(d => d.CreatedAt)
                                 .Where(x => x.PeriodExam == periodExam && x.RegisterDate != null && x.Status != "register" && x.Status != "rejectRegister")
                                 .Where(x =>
-                                        (x.PositionExam == null || x.PositionExam.PositionLevelName == null ? true : x.PositionExam.PositionLevelName.Contains(keyword)) ||
-                                        (x.PositionExam == null || x.PositionExam.PositionName == null ? true : x.PositionExam.PositionName.Contains(keyword)) ||
-                                        (x.CitizenId == null ? true : x.CitizenId.Contains(keyword)) ||
-                                        (x.PrefixName == null ? true : x.PrefixName.Contains(keyword)) ||
-                                        (x.FirstName == null ? true : x.FirstName.Contains(keyword)) ||
-                                        (x.LastName == null ? true : x.LastName.Contains(keyword)) ||
-                                        (x.ExamIdenNumber == null ? true : x.ExamIdenNumber.Contains(keyword)) ||
-                                        (x.SeatNumber == null ? true : x.SeatNumber.Contains(keyword)) ||
-                                        (x.ResultA == null ? true : x.ResultA.Contains(keyword)) ||
-                                        (x.ResultB == null ? true : x.ResultB.Contains(keyword)) ||
-                                        (x.ResultC == null ? true : x.ResultC.Contains(keyword)) ||
-                                        (x.Pass == null ? true : x.Pass.Contains(keyword))
-                                // (x.RegisterDate == null ? true : x.RegisterDate.Value.ToThaiShortDateTime().Contains(keyword))
+                                        (x.PositionExam == null || x.PositionExam.PositionLevelName == null ? false : x.PositionExam.PositionLevelName.Contains(keyword)) ||
+                                        (x.PositionExam == null || x.PositionExam.PositionName == null ? false : x.PositionExam.PositionName.Contains(keyword)) ||
+                                        (x.CitizenId == null ? false : x.CitizenId.Contains(keyword)) ||
+                                        (x.PrefixName == null ? false : x.PrefixName.Contains(keyword)) ||
+                                        (x.FirstName == null ? false : x.FirstName.Contains(keyword)) ||
+                                        (x.LastName == null ? false : x.LastName.Contains(keyword)) ||
+                                        (x.ExamIdenNumber == null ? false : x.ExamIdenNumber.Contains(keyword)) ||
+                                        (x.SeatNumber == null ? false : x.SeatNumber.Contains(keyword)) ||
+                                        (x.ResultA == null ? false : x.ResultA.Contains(keyword)) ||
+                                        (x.ResultB == null ? false : x.ResultB.Contains(keyword)) ||
+                                        (x.ResultC == null ? false : x.ResultC.Contains(keyword)) ||
+                                        (x.Pass == null ? false : x.Pass.Contains(keyword))
+                                // (x.RegisterDate == null ? false : x.RegisterDate.Value.ToThaiShortDateTime().Contains(keyword))
                                 )
                                 .Select(x => new
                                 {
@@ -733,19 +733,19 @@ namespace BMA.EHR.Recurit.Exam.Service.Services
                 var _candidate = await _context.Candidates.AsQueryable()
                                 .Where(x => x.PeriodExam == periodExam && x.RegisterDate != null && x.Status != "register" && x.Status != "rejectRegister")
                                 .Where(x =>
-                                        (x.PositionExam == null || x.PositionExam.PositionLevelName == null ? true : x.PositionExam.PositionLevelName.Contains(keyword)) ||
-                                        (x.PositionExam == null || x.PositionExam.PositionName == null ? true : x.PositionExam.PositionName.Contains(keyword)) ||
-                                        (x.CitizenId == null ? true : x.CitizenId.Contains(keyword)) ||
-                                        (x.PrefixName == null ? true : x.PrefixName.Contains(keyword)) ||
-                                        (x.FirstName == null ? true : x.FirstName.Contains(keyword)) ||
-                                        (x.LastName == null ? true : x.LastName.Contains(keyword)) ||
-                                        (x.ExamIdenNumber == null ? true : x.ExamIdenNumber.Contains(keyword)) ||
-                                        (x.SeatNumber == null ? true : x.SeatNumber.Contains(keyword)) ||
-                                        (x.ResultA == null ? true : x.ResultA.Contains(keyword)) ||
-                                        (x.ResultB == null ? true : x.ResultB.Contains(keyword)) ||
-                                        (x.ResultC == null ? true : x.ResultC.Contains(keyword)) ||
-                                        (x.Pass == null ? true : x.Pass.Contains(keyword))
-                                // (x.RegisterDate == null ? true : x.RegisterDate.Value.ToThaiShortDateTime().Contains(keyword))
+                                        (x.PositionExam == null || x.PositionExam.PositionLevelName == null ? false : x.PositionExam.PositionLevelName.Contains(keyword)) ||
+                                        (x.PositionExam == null || x.PositionExam.PositionName == null ? false : x.PositionExam.PositionName.Contains(keyword)) ||
+                                        (x.CitizenId == null ? false : x.CitizenId.Contains(keyword)) ||
+                                        (x.PrefixName == null ? false : x.PrefixName.Contains(keyword)) ||
+                                        (x.FirstName == null ? false : x.FirstName.Contains(keyword)) ||
+                                        (x.LastName == null ? false : x.LastName.Contains(keyword)) ||
+                                        (x.ExamIdenNumber == null ? false : x.ExamIdenNumber.Contains(keyword)) ||
+                                        (x.SeatNumber == null ? false : x.SeatNumber.Contains(keyword)) ||
+                                        (x.ResultA == null ? false : x.ResultA.Contains(keyword)) ||
+                                        (x.ResultB == null ? false : x.ResultB.Contains(keyword)) ||
+                                        (x.ResultC == null ? false : x.ResultC.Contains(keyword)) ||
+                                        (x.Pass == null ? false : x.Pass.Contains(keyword))
+                                // (x.RegisterDate == null ? false : x.RegisterDate.Value.ToThaiShortDateTime().Contains(keyword))
                                 )
                                 .CountAsync();
                 if (candidate.Where(x => x.Status == "done").FirstOrDefault() != null)
@@ -767,19 +767,19 @@ namespace BMA.EHR.Recurit.Exam.Service.Services
                                 .OrderByDescending(d => d.CreatedAt)
                                 .Where(x => x.PeriodExam == periodExam && x.Status == status)
                                 .Where(x =>
-                                        (x.PositionExam == null || x.PositionExam.PositionLevelName == null ? true : x.PositionExam.PositionLevelName.Contains(keyword)) ||
-                                        (x.PositionExam == null || x.PositionExam.PositionName == null ? true : x.PositionExam.PositionName.Contains(keyword)) ||
-                                        (x.CitizenId == null ? true : x.CitizenId.Contains(keyword)) ||
-                                        (x.PrefixName == null ? true : x.PrefixName.Contains(keyword)) ||
-                                        (x.FirstName == null ? true : x.FirstName.Contains(keyword)) ||
-                                        (x.LastName == null ? true : x.LastName.Contains(keyword)) ||
-                                        (x.ExamIdenNumber == null ? true : x.ExamIdenNumber.Contains(keyword)) ||
-                                        (x.SeatNumber == null ? true : x.SeatNumber.Contains(keyword)) ||
-                                        (x.ResultA == null ? true : x.ResultA.Contains(keyword)) ||
-                                        (x.ResultB == null ? true : x.ResultB.Contains(keyword)) ||
-                                        (x.ResultC == null ? true : x.ResultC.Contains(keyword)) ||
-                                        (x.Pass == null ? true : x.Pass.Contains(keyword))
-                                // (x.RegisterDate == null ? true : x.RegisterDate.Value.ToThaiShortDateTime().Contains(keyword))
+                                        (x.PositionExam == null || x.PositionExam.PositionLevelName == null ? false : x.PositionExam.PositionLevelName.Contains(keyword)) ||
+                                        (x.PositionExam == null || x.PositionExam.PositionName == null ? false : x.PositionExam.PositionName.Contains(keyword)) ||
+                                        (x.CitizenId == null ? false : x.CitizenId.Contains(keyword)) ||
+                                        (x.PrefixName == null ? false : x.PrefixName.Contains(keyword)) ||
+                                        (x.FirstName == null ? false : x.FirstName.Contains(keyword)) ||
+                                        (x.LastName == null ? false : x.LastName.Contains(keyword)) ||
+                                        (x.ExamIdenNumber == null ? false : x.ExamIdenNumber.Contains(keyword)) ||
+                                        (x.SeatNumber == null ? false : x.SeatNumber.Contains(keyword)) ||
+                                        (x.ResultA == null ? false : x.ResultA.Contains(keyword)) ||
+                                        (x.ResultB == null ? false : x.ResultB.Contains(keyword)) ||
+                                        (x.ResultC == null ? false : x.ResultC.Contains(keyword)) ||
+                                        (x.Pass == null ? false : x.Pass.Contains(keyword))
+                                // (x.RegisterDate == null ? false : x.RegisterDate.Value.ToThaiShortDateTime().Contains(keyword))
                                 )
                                 .Skip((page - 1) * pageSize)
                                 .Take(pageSize)
@@ -808,19 +808,19 @@ namespace BMA.EHR.Recurit.Exam.Service.Services
                 var _candidate = await _context.Candidates.AsQueryable()
                                 .Where(x => x.PeriodExam == periodExam && x.RegisterDate != null && x.Status != "register" && x.Status != "rejectRegister")
                                 .Where(x =>
-                                        (x.PositionExam == null || x.PositionExam.PositionLevelName == null ? true : x.PositionExam.PositionLevelName.Contains(keyword)) ||
-                                        (x.PositionExam == null || x.PositionExam.PositionName == null ? true : x.PositionExam.PositionName.Contains(keyword)) ||
-                                        (x.CitizenId == null ? true : x.CitizenId.Contains(keyword)) ||
-                                        (x.PrefixName == null ? true : x.PrefixName.Contains(keyword)) ||
-                                        (x.FirstName == null ? true : x.FirstName.Contains(keyword)) ||
-                                        (x.LastName == null ? true : x.LastName.Contains(keyword)) ||
-                                        (x.ExamIdenNumber == null ? true : x.ExamIdenNumber.Contains(keyword)) ||
-                                        (x.SeatNumber == null ? true : x.SeatNumber.Contains(keyword)) ||
-                                        (x.ResultA == null ? true : x.ResultA.Contains(keyword)) ||
-                                        (x.ResultB == null ? true : x.ResultB.Contains(keyword)) ||
-                                        (x.ResultC == null ? true : x.ResultC.Contains(keyword)) ||
-                                        (x.Pass == null ? true : x.Pass.Contains(keyword))
-                                // (x.RegisterDate == null ? true : x.RegisterDate.Value.ToThaiShortDateTime().Contains(keyword))
+                                        (x.PositionExam == null || x.PositionExam.PositionLevelName == null ? false : x.PositionExam.PositionLevelName.Contains(keyword)) ||
+                                        (x.PositionExam == null || x.PositionExam.PositionName == null ? false : x.PositionExam.PositionName.Contains(keyword)) ||
+                                        (x.CitizenId == null ? false : x.CitizenId.Contains(keyword)) ||
+                                        (x.PrefixName == null ? false : x.PrefixName.Contains(keyword)) ||
+                                        (x.FirstName == null ? false : x.FirstName.Contains(keyword)) ||
+                                        (x.LastName == null ? false : x.LastName.Contains(keyword)) ||
+                                        (x.ExamIdenNumber == null ? false : x.ExamIdenNumber.Contains(keyword)) ||
+                                        (x.SeatNumber == null ? false : x.SeatNumber.Contains(keyword)) ||
+                                        (x.ResultA == null ? false : x.ResultA.Contains(keyword)) ||
+                                        (x.ResultB == null ? false : x.ResultB.Contains(keyword)) ||
+                                        (x.ResultC == null ? false : x.ResultC.Contains(keyword)) ||
+                                        (x.Pass == null ? false : x.Pass.Contains(keyword))
+                                // (x.RegisterDate == null ? false : x.RegisterDate.Value.ToThaiShortDateTime().Contains(keyword))
                                 )
                                 .CountAsync();
                 if (candidate.Where(x => x.Status == "done").FirstOrDefault() != null)