Perhaps you should try some spelling variations:
doanh luan » doanh nhan
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, nhieu tang
tranh cua » doanh cua
manh cua » doanh cua, ban cua
cong ban » cong bang, cong san, cong tan
ban than » ban thanh, van thanh, ban hang
than cao » toan cao, thai cao, than cap
ho hieu » ho chieu, hoi hieu, nho hieu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - hanh ((((tranh cua) OR (manh cua))) OR (doanh luan)) nhung cong ban than cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - hanh ((((tranh cua) OR (manh cua))) or (doanh luan)) nhung cong ban than cao~".
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - hanh ((((tranh cua) OR (manh cua))) or (doanh luan)) nhung cong ban than cao*.