Perhaps you should try some spelling variations:
hanh doanh » hang doanh, chinh doanh, doanh doanh
doanh luan » doanh nhan
phung cong » phong cong, nhung chong, dung cong
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, nhieu tang
hoc hieu » hoc thieu, hoc hien, doc hieu
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

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 lang - hanh doanh luan ((phung cong) or (nhung cong)) dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu lang - hanh doanh luan ((phung cong) OR (nhung cong)) dan than cau.
• Adding a wildcard symbol may retrieve word variants: hoc hieu lang - hanh doanh luan ((phung cong) or (nhung cong)) dan than cau*.