Perhaps you should try some spelling variations:
tranh luan » trinh luan, trinh luat, tang luan
doanh luan » doanh nhan
nhung cong » dung cong, thong cong, hang cong
lieu tinh » diep tinh, bien tinh
cong tac » cong ty
tac than » tac thanh, tam than, tac nhan
than cao » toan cao, thai cao, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((lieu tinh) OR (trieu tinh)) - hanh ((tranh luan) or (doanh luan)) nhung cong tac than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((lieu tinh) OR (trieu tinh)) - hanh ((tranh luan) OR (doanh luan)) nhung cong tac than cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((lieu tinh) OR (trieu tinh)) - hanh ((tranh luan) or (doanh luan)) nhung cong tac than cao".
• Adding a wildcard symbol may retrieve word variants: ho ((lieu tinh) OR (trieu tinh)) - hanh ((tranh luan) or (doanh luan)) nhung cong tac than cao*.