private void set_define_event()
{
Load += f471_bao_cao_qua_trinh_cong_tac_Load;
m_cmd_filter.Click += m_cmd_filter_Click;
m_cmd_xuat_excel.Click += m_cmd_xuat_excel_Click;
m_sle_chon_nhan_vien.EditValueChanged += M_sle_chon_nhan_vien_EditValueChanged;
}