Perhaps you should try some spelling variations:
hanh trinh » hanh chinh
hieu manh » chieu xanh, hieu nganh, dieu hanh
cua thong » cua thuong, cua tong, suat thong
cua khong » hua khong, cua phuong, cua thuong
hoc hieu » hoc thieu, hoc hien, doc hieu
cong san » cong tac
san than » sang than, san thanh, ban than
than ban » thanh ban, toan ban, than man

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) or (canh tranh)) ((cua thong) or (cua khong)) cong san than ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - ((hanh trinh) OR (canh tranh)) ((cua thong) OR (cua khong)) cong san than ban.
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - ((hanh trinh) or (canh tranh)) ((cua thong) or (cua khong)) cong san than ban*.