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