Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
bien tinh » bi tinh, yen tinh, diep tinh
luan dang » luan nang, luan dong, luan tang
luan danh » luan thanh, luan van, luan nang
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
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) or (luan danh)) cong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so bien tinh - hanh trang ((luan dang) OR (luan danh)) cong dan toan cau.
• Adding a wildcard symbol may retrieve word variants: so bien tinh - hanh trang ((luan dang) or (luan danh)) cong dan toan cau*.