Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
trung cua » truong cua, trung tuan, trung cap
doc hieu » toc thieu, hoc thieu, hoc hien
than cua » nhan cua, thai cua, ban cua
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
toan cau » toan cao, toan ban, toan tap

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: doc hieu nganh - hanh ((than cua) OR (trung cua)) nhung ((cong dan) OR (cong tan)) toan cau~.
• Adding a wildcard symbol may retrieve word variants: doc hieu nganh - hanh ((than cua) or (trung cua)) nhung ((cong dan) or (cong tan)) toan cau*.