Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
luan trong » quan trong, luat trong, luan tuong
bien tinh » bi tinh, yen tinh, diep tinh
anh nang » ganh nang, anh bang, anh dang
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
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) or (anh nang)) luan trong cong tan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so bien tinh - ((hanh trang) OR (anh nang)) luan trong cong tan toan cao*.