Perhaps you should try some spelling variations:
doanh phan » doanh nhan, doan phan, doanh thanh
cong doanh » cong danh, cong doan, dong doanh
hieu lang » chieu sang, hieu quang, nhieu tang
lang vong » lang dong, lang song, lang trong
doi hieu » doi chieu, doc hieu, doi hien
lang van » dang van, tang van, hoang van

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doi hieu lang - ((lang van) or (lang vong)) gian trong cong doanh phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi hieu lang - ((lang van) OR (lang vong)) gian trong cong doanh phan tu*.