private void buttonChiTiet_Click(object sender, EventArgs e)
        {
            // truyền mã sang form bên kia
            this.Hide();
            ChiTiet formCT = new ChiTiet("");

            formCT.FormClosed += FormCT_FormClosed;
            formCT.Show();
        }
        private void buttonChiTiet_Click(object sender, EventArgs e)
        {
            // truyền mã sang form bên kia
            DataGridViewRow current   = dataGridViewDS_HS.CurrentRow;
            string          MaTimKiem = current.Cells[0].Value.ToString();
            string          ChucVu    = current.Cells[5].Value.ToString();

            this.Hide();

            ChiTiet formCT = new ChiTiet(MaTimKiem, ChucVu);

            formCT.FormClosed += FormCT_FormClosed;
            formCT.Show();
        }