Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
nhung cong » dung cong, thong cong, hang cong
bien tinh » bi tinh, diep tinh, ban tinh
yen tinh » tuyen tinh
trang va » tran van, hang va
cong san » cong tac
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((bien tinh) or (yen tinh)) - hanh trang va nhung cong san ((toan cau) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((bien tinh) OR (yen tinh)) - hanh trang va nhung cong san ((toan cau) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: hoc ((bien tinh) or (yen tinh)) - hanh trang va nhung cong san ((toan cau) or (toan cao))*.