Perhaps you should try some spelling variations:
tranh luan » trinh luan, trinh luat, doanh luan
luan nhung » luan chung, luan hung, quan nhung
lieu tinh » trieu tinh, diep tinh, bien tinh
cong tan » cong tac, cong san, cong thanh
tran cau » tran chau, toan cau, tra cau
so lieu » so dieu
ran cau » van cau, ban cau, can cau

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

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