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