Perhaps you should try some spelling variations:
tranh luan » trinh luan, trinh luat, doanh luan
luan chung » luan chinh
chung cong » nhung cong, chong cong, phung cong
ho chieu » theo chieu, hoc thieu, doi chieu
cong tac » cong ty
than cau » phan cau, than cap, thanh chau
toan cau » toan cao, toan ban, toan tap
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: ((ho chieu) or (doi chi)) xanh - canh tranh luan chung cong tac ((than cau) OR (toan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chi)) xanh - canh tranh luan chung cong tac ((than cau) OR (toan cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (doi chi)) xanh - canh tranh luan chung cong tac ((than cau) OR (toan cau))".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (doi chi)) xanh - canh tranh luan chung cong tac ((than cau) OR (toan cau))*.