syntax error: select * from sanpham where (idDM = hang or idDM in (select idDM from danhmuc where cap1 = hang) or idDM in (select idDM from danhmuc where dmCha = hang) or idDM in (select idDM from danhmuc where dmCha in (select idDM from danhmuc where cap1 = hang))) order by vitri, idSP DESC