Perhaps you should try some spelling variations:
hanh doanh » hang doanh, doanh doanh, hanh dong
thong cong » trong cong, tong cong, thong thong
hieu lang » chieu sang, hieu quang, nhieu tang
cua thong » cua thuong, cua khong, cua tong
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 (hanh doanh)) cua thong 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 (hanh doanh)) cua thong cong tan van ban.
• Adding a wildcard symbol may retrieve word variants: hoc hieu lang - ((((chinh doanh) or (kinh doanh))) or (hanh doanh)) cua thong cong tan van ban*.