Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
trang tuan » tran tuan, trung tuan, trong tuan
cong thanh » dong thanh, cong trinh, cong tan
hieu lang » chieu sang, hieu quang, nhieu tang
tuan hung » tran hung, luan hung, tuan dung
hoc hieu » hoc thieu, hoc hien, doc hieu
cong san » cong tac
toan cau » 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 hieu lang - hanh trang tuan hung ((cong san) or (cong thanh)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu lang - hanh trang tuan hung ((cong san) OR (cong thanh)) toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc hieu lang - hanh trang tuan hung ((cong san) or (cong thanh)) toan cau*.