Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
trang luan » tang luan, tranh luan, trang tuan
bien tinh » bi tinh, yen tinh, diep tinh
luan dang » luan nang, luan danh, luan dong
cong tac » cong ty
toan cau » toan cao, toan ban, toan tap
so bien » mot bien

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

• Performing a fuzzy search may retrieve terms with similar spellings: so bien tinh - hanh trang luan dang ((cong san) OR (cong tac)) toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so bien tinh - hanh trang luan dang ((cong san) OR (cong tac)) toan cau".
• Adding a wildcard symbol may retrieve word variants: so bien tinh - hanh trang luan dang ((cong san) OR (cong tac)) toan cau*.