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 idSP DESC