diff --git a/backend/internal/router/admin/announcements.go b/backend/internal/router/admin/announcements.go
index b72b9bb..98a4fc4 100644
--- a/backend/internal/router/admin/announcements.go
+++ b/backend/internal/router/admin/announcements.go
@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"log"
 	"strconv"
+	"strings"
 
 	"verification-platform-backend/internal/database"
 	"verification-platform-backend/internal/model"
diff --git a/backend/internal/router/admin/cloud.go b/backend/internal/router/admin/cloud.go
index e21d25a..83bcb4e 100644
--- a/backend/internal/router/admin/cloud.go
+++ b/backend/internal/router/admin/cloud.go
@@ -761,7 +761,7 @@ func handleGetCloudVariableRecords(c *gin.Context) {
 				}
 			}
 
-			if strings.Contains(strings.ToLower(record.CreatedAt), searchLower) {
+			if strings.Contains(strings.ToLower(record.CreatedAt.Format("2006-01-02 15:04:05")), searchLower) {
 				filteredRecords = append(filteredRecords, record)
 				continue
 			}
diff --git a/backend/internal/router/admin/devices.go b/backend/internal/router/admin/devices.go
index 0d3fd3b..2c71246 100644
--- a/backend/internal/router/admin/devices.go
+++ b/backend/internal/router/admin/devices.go
@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"log"
 	"strconv"
+	"strings"
 	"time"
 	"verification-platform-backend/internal/database"
 	"verification-platform-backend/internal/model"