syntax error: select * from sanpham where (idDM = muc/service or idDM in (select idDM from danhmuc where cap1 = muc/service) or idDM in (select idDM from danhmuc where dmCha = muc/service) or idDM in (select idDM from danhmuc where dmCha in (select idDM from danhmuc where cap1 = muc/service))) or (idDM2 = muc/service or idDM2 in (select idDM from danhmuc where cap1 = muc/service) or idDM2 in (select idDM from danhmuc where dmCha = muc/service) or idDM2 in (select idDM from danhmuc where dmCha in (select idDM from danhmuc where cap1 = muc/service))) order by vitri, idSP DESC