private DataTable load_data_to_loai_hd()
{
US_DM_LOAI_HOP_DONG v_us = new US_DM_LOAI_HOP_DONG();
DS_DM_LOAI_HOP_DONG v_ds = new DS_DM_LOAI_HOP_DONG();
v_us.FillDataset(v_ds);
return v_ds.Tables[0];
}