private void btnNguonChi_Click(object sender, EventArgs e)
        {
            frmThongKeNguonChi form = new frmThongKeNguonChi(this, _CurrentNXB);

            form.ShowDialog(this);
        }
 private void btnNguonChi_Click(object sender, EventArgs e)
 {
     frmThongKeNguonChi form = new frmThongKeNguonChi(this,_CurrentNXB);
     form.ShowDialog(this);
 }