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
cong tac » cong ty
tac than » tac thanh, tam than, tac nhan
than cau » toan cau, phan cau, than cap
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 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 cau.
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (doi chi)) xanh - canh tranh luan dung cong tac than cau*.