Perhaps you should try some spelling variations:
tranh luan » trinh luan, trinh luat, doanh luan
nhung cong » dung cong, thong cong, nhung don
tang luan » dung luan
hang cong » dang cong, hang nong, bang cong
chi hanh » chi nhanh, chi thanh, thi hanh
doi chi » doi khi
san cao » san co, san cho, san bao

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

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