Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh luan » trinh luan, trinh luat, doanh luan
doi chieu » doc hieu, ho chieu, mot chieu
luan dang » luan nang, luan danh, luan dong
dang cong » dung cong
cong dan » cong san, cong tan, huong dan
toan cau » toan cao, toan tap, toan tai
toan ban » van ban
doi chi » doi khi

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (doi chi)) tinh - hanh tranh luan dang cong dan ((toan cau) OR (toan ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) OR (doi chi)) tinh - hanh tranh luan dang cong dan ((toan cau) or (toan ban))~".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) OR (doi chi)) tinh - hanh tranh luan dang cong dan ((toan cau) or (toan ban))*.