Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
hanh tram » hanh tam, hanh trang, thanh tran
van nhung » van nhuong, va nhung, van hung
hoc hieu » hoc thieu, hoc hien, doc hieu
tram van » tran van, tam van, trang van
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
than cao » toan cao, thai cao, than cap

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu nganh - hanh tram van nhung ((cong dan) OR (cong tan)) than cao~".
• Adding a wildcard symbol may retrieve word variants: hoc hieu nganh - hanh tram van nhung ((cong dan) OR (cong tan)) than cao*.