Perhaps you should try some spelling variations:
hieu cach » hieu cac, chieu sach, hieu ca
manh hung » anh huong
hoc hieu » hoc thieu, hoc hien, doc hieu
hung cua » huong cua, chung cua, khung cua
cua dang » cua cong, cua ban
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
than cau » toan cau, phan cau, than cap

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu cach - manh hung cua dang ((cong dan) OR (cong san)) ((than cau) OR (phan tu))~.
• Adding a wildcard symbol may retrieve word variants: hoc hieu cach - manh hung cua dang ((cong dan) or (cong san)) ((than cau) or (phan tu))*.