syntax error: select id,thumb,ten_vi as ten,photo,tenkhongdau,gia,giakm,masp,spbc,spkm,ngaytao,giakm,noibat,mota_vi as mota, chietkhau,dai,rong,cao,rate,phantramgiam,vitri from table_product where hienthi=1  and type ='' and id<>'' and id_list = '' and ( tiendo =  or tiendo = 1 or tiendo = -1) order by RAND() limit 0,20