Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hieu manh » chieu xanh, hieu nganh, dieu hanh
chinh cua » chinh ca, chinh sua, hinh cua
cua nhung » va nhung
hoc hieu » hoc thieu, hoc hien, doc hieu
cong van » cong vang, cong san, song van
toan tap » toan ban

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 van ((doanh tai) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - hanh chinh cua nhung cong van ((doanh tai) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - hanh chinh cua nhung cong van ((doanh tai) or (toan tap))*.