Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hieu manh » chieu xanh, hieu nganh, dieu hanh
nhung don » nhung van, nhung bo
hang cong » dang cong, hang nong, bang cong
thanh cac » hanh cac, thanh bac, tranh cac
doc hieu » toc thieu, hoc thieu, hoc hien
thanh ca » thanh cha, thanh ha, thanh va

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 - hanh trinh luat ((nhung don) or (hang cong)) dan ((thanh ca) or (thanh cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu manh - hanh trinh luat ((nhung don) OR (hang cong)) dan ((thanh ca) OR (thanh cac)).
• Adding a wildcard symbol may retrieve word variants: doc hieu manh - hanh trinh luat ((nhung don) or (hang cong)) dan ((thanh ca) or (thanh cac))*.