Perhaps you should try some spelling variations:
hanh doanh » hang doanh, chinh doanh, doanh doanh
doanh luan » doanh nhan
hieu lang » chieu sang, hieu quang, nhieu tang
luan dung » lan dung, luan dong, luan hung
dung cong » dung trong
doi hieu » doi chieu, doc hieu, doi hien
cong tan » cong tac, cong san, cong thanh
toan ban » van ban

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 - hanh doanh luan dung cong tan ((toan ban) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi hieu lang - hanh doanh luan dung cong tan ((toan ban) OR (toan tap))*.