private function getSomeUser($txtLoaiUser = null, $txtTK = null)
 {
     $dsNguoiDung = null;
     if ($txtLoaiUser != null && $txtTK == null) {
         $dsNguoiDung = NguoiDung::orderBy('ma_so_the')->where('id_nhom_quyen_han', '=', $txtLoaiUser)->paginate(QUAN_LY_SO_NGUOI_DUNG_TREN_TRANG);
     } else {
         if ($txtLoaiUser == null && $txtTK != null) {
             $dsNguoiDung = $this->getAllUser();
             //edit
         } else {
             if ($txtLoaiUser != null && $txtTK != null) {
                 $dsNguoiDung = NguoiDung::orderBy('ma_so_the')->where('id_nhom_quyen_han', '=', $txtLoaiUser)->paginate(QUAN_LY_SO_NGUOI_DUNG_TREN_TRANG);
                 //edit
             } else {
                 $dsNguoiDung = $this->getAllUser();
             }
         }
     }
     return $dsNguoiDung;
 }