Perhaps you should try some spelling variations:
doanh sang » doanh quang, doanh ban, doanh van
thuong han » thuong mai, thuong va, thuong gap
thuong dam » thuong mai, huong dan, truong dai
hieu lang » chieu sang, hieu quang, nhieu tang
hoc hieu » hoc thieu, hoc hien, doc hieu
sang luc » nang luc, dong luc, sang tac
luc cong » luoc cong, duc cong, luc dong
than cap » khan cap, thanh lap, thanh cac

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 - doanh sang luc cong ((thuong han) or (thuong dam)) than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu lang - doanh sang luc cong ((thuong han) OR (thuong dam)) than cap.
• Adding a wildcard symbol may retrieve word variants: hoc hieu lang - doanh sang luc cong ((thuong han) or (thuong dam)) than cap*.