public IEnumerable<NHAN_SU_SearchResult> NHAN_SU_Search(NHAN_SU_SearchResult data, int? top)
 {
     try
     {
         using (var db = new OOAD_EDUManagementDataContext())
         {
             return db.NHAN_SU_Search(data.maNhanSu,
                                       data.maXNhanSu,
                                       data.hoVaTen,
                                       data.CMND,
                                       data.diaChi,
                                       data.email,
                                       data.ngaySinh == null ? "" : data.ngaySinh.Value.ToString(Constants.FormatDate),
                                       data.noiCongTac,
                                       data.noiSinh,
                                       data.soDienThoai,
                                       data.maNguoiLap,
                                       data.thoiGianLap == null ? "" : data.thoiGianLap.Value.ToString(Constants.FormatDate),
                                       data.maNguoiDuyet,
                                       data.thoiGianDuyet == null ? "" : data.thoiGianDuyet.Value.ToString(Constants.FormatDate),
                                       data.maTrangThaiDuyet,
                                       data.trangThaiDuLieu,
                                       top).ToList();
         }
     }
     catch (Exception e) { return null; }
 }