Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hieu manh » chieu xanh, hieu nganh, dieu hanh
hoc hieu » hoc thieu, hoc hien, doc hieu
trinh va » trinh van, trinh vat, trinh ve
cong tan » cong san, cong thanh, cong ty
cong tac » cong ty
chan cau » phan cau, can cau, chinh cau
phan dau » phan tu, hang dau

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 trinh va nhung ((cong tan) or (cong tac)) ((chan cau) or (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - hanh trinh va nhung ((cong tan) OR (cong tac)) ((chan cau) OR (phan dau)).
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - hanh trinh va nhung ((cong tan) or (cong tac)) ((chan cau) or (phan dau))*.