Perhaps you should try some spelling variations:
hang doanh » hanh doanh, nhung doanh, van doanh
khong cong » thong cong, khong cang, chong cong
hieu lang » chieu sang, hieu quang, nhieu tang
cua khong » hua khong, cua phuong, cua thuong
hoc hieu » hoc thieu, hoc hien, doc hieu
cong tan » cong tac, cong san, cong thanh
tan van » tran van, tang van, luan van

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 - ((((chinh doanh) or (kinh doanh))) or (hang doanh)) cua khong cong tan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu lang - ((((chinh doanh) OR (kinh doanh))) OR (hang doanh)) cua khong cong tan van ban.
• Adding a wildcard symbol may retrieve word variants: hoc hieu lang - ((((chinh doanh) or (kinh doanh))) or (hang doanh)) cua khong cong tan van ban*.