Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
nhung cong » dung cong, thong cong, hang cong
thanh tra » thanh toan, thanh hoa
van nhung » van nhuong, va nhung, van hung
tac thanh » bac thanh, cac thanh, tcc thanh
doc hieu » toc thieu, hoc thieu, hoc hien
hanh tam » thanh tam, nhanh tam, hanh tram
tac than » tam than, tac nhan, bac thanh

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 - ((thanh tra) OR (hanh tam)) van nhung cong ((tac than) OR (tac thanh)) cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu nganh - ((thanh tra) or (hanh tam)) van nhung cong ((tac than) OR (tac thanh)) cao~".
• Adding a wildcard symbol may retrieve word variants: doc hieu nganh - ((thanh tra) or (hanh tam)) van nhung cong ((tac than) OR (tac thanh)) cao*.