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