Perhaps you should try some spelling variations:
tranh luan » trinh luan, trinh luat, doanh luan
doi chieu » doc hieu, ho chieu, mot chieu
luan dung » lan dung, luan dong, luan hung
dung cong » dung trong
tac than » tac thanh, tac nhan, bac thanh
tam than » ban than
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) or (doi chi)) xanh - canh tranh luan dung cong ((tac than) OR (tam than)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (doi chi)) xanh - canh tranh luan dung cong ((tac than) OR (tam than)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) or (doi chi)) xanh - canh tranh luan dung cong ((tac than) OR (tam than)) cau".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (doi chi)) xanh - canh tranh luan dung cong ((tac than) OR (tam than)) cau*.