Perhaps you should try some spelling variations:
hanh doanh » hang doanh, chinh doanh, doanh doanh
doanh luan » doanh nhan
luan nhung » luan chung, luan hung, quan nhung
hieu lang » chieu sang, hieu quang, nhieu tang
hoc hieu » hoc thieu, hoc hien, doc hieu
cong tan » cong san, cong thanh, cong ty
cong tac » cong ty
tran ban » tranh ban, tran van, toan ban

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu lang - hanh doanh luan nhung ((cong tan) OR (cong tac)) tran ban~".
• Adding a wildcard symbol may retrieve word variants: hoc hieu lang - hanh doanh luan nhung ((cong tan) OR (cong tac)) tran ban*.