Perhaps you should try some spelling variations:
cong doanh » cong danh, cong doan, dong doanh
quan trong » gian trong
doanh phan » doanh nhan, doan phan, doanh thanh
hieu lang » chieu sang, hieu quang, nhieu tang
lang vang » lang vong, lang thang, dang van
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.

• If you are trying to use Boolean operators, they must be ALL CAPS: doi hieu lang - ((lang van) OR (lang vang)) quan trong cong doanh phan tu~.
• Adding a wildcard symbol may retrieve word variants: doi hieu lang - ((lang van) or (lang vang)) quan trong cong doanh phan tu*.