Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
canh tinh » hanh tinh, manh tinh, canh tranh
doc hieu » toc thieu, hoc thieu, hoc hien
tinh cua » trinh cua, sinh cua, tinh chat
cua dung » cua dang, cua dong, qua dung
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
than cap » khan cap, thanh lap, thanh cac
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu nganh - canh tinh cua dung ((cong dan) OR (cong tan)) ((than cap) or (phan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu nganh - canh tinh cua dung ((cong dan) OR (cong tan)) ((than cap) OR (phan cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu nganh - canh tinh cua dung ((cong dan) OR (cong tan)) ((than cap) or (phan cau))".
• Adding a wildcard symbol may retrieve word variants: doc hieu nganh - canh tinh cua dung ((cong dan) OR (cong tan)) ((than cap) or (phan cau))*.