Perhaps you should try some spelling variations:
nhung cong » thong cong, hang cong, nhung don
hieu manh » chieu xanh, hieu nganh, dieu hanh
chinh cua » chinh ca, chinh sua, hinh cua
dung cong » dung trong
hoc hieu » hoc thieu, hoc hien, doc hieu
khan cap » khan ap, khoan cam, phan cac
than cap » thanh lap, thanh cac, than cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu manh - hanh chinh cua ((nhung cong) or (dung cong)) ban ((khan cap) or (than cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - hanh chinh cua ((nhung cong) OR (dung cong)) ban ((khan cap) OR (than cap)).
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - hanh chinh cua ((nhung cong) or (dung cong)) ban ((khan cap) or (than cap))*.