Perhaps you should try some spelling variations:
hoan chinh » hanh chinh, hoa hinh
luan chinh » luan chi, luat hinh
hieu manh » chieu xanh, hieu nganh, dieu hanh
doc hieu » toc thieu, hoc thieu, hoc hien
anh tang » anh bang, anh dang, anh nang
cong tac » cong ty
tac than » tac thanh, tam than, tac nhan
than cau » toan cau, phan cau, than cap

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 manh - anh tang ((luan chinh) or (hoan chinh)) cong tac than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu manh - anh tang ((luan chinh) OR (hoan chinh)) cong tac than cau*.