public IActionResult Search(string search, int?pagenumber)
        {
            pageNumber = pagenumber ?? 1;
            ViTriQuangcaoBUS     vitri    = new ViTriQuangcaoBUS();
            GoiQuangCaoBUS       goi      = new GoiQuangCaoBUS();
            List <GoiQuangCao>   list     = goi.Search(search, pageSize, pageNumber);
            List <GoiQuangCao>   tong     = goi.Search(search, pageSize);
            List <ViTriQuangcao> listvtqc = vitri.GetViTriQuangcaos();

            ViewBag.TrangHienTai = pageNumber;

            ViewBag.ViTriQuangcao = listvtqc;
            ViewBag.TongTrang     = TongTrang(tong);
            ViewBag.TrangThai     = "search";
            ViewBag.Search        = search;
            return(View("Index", list));
        }