Perhaps you should try some spelling variations:
tranh luan » trinh luan, trinh luat, doanh luan
luan nhung » luan chung, luan hung, quan nhung
cong thanh » dong thanh, cong trinh, cong tan
cong san » cong tac
tran cau » tran chau, toan cau, ran cau
ho lieu » co lieu, ho kieu, ho chieu
so lieu » so dieu

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