Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh luan » trinh luan, trinh luat, doanh luan
hoc chieu » hoc thieu, ho chieu, hoc hien
luan tong » luan tuong, luan cong, luan dong
cong san » cong tac
than cau » phan cau, than cap, thanh chau
toan cau » toan cao, toan ban, toan tap

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: hoc chieu xanh - hanh tranh luan tong ((cong san) OR (huong dan)) ((than cau) OR (toan cau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu xanh - hanh tranh luan tong ((cong san) or (huong dan)) ((than cau) OR (toan cau))~".
• Adding a wildcard symbol may retrieve word variants: hoc chieu xanh - hanh tranh luan tong ((cong san) or (huong dan)) ((than cau) OR (toan cau))*.