Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hieu lang » chieu sang, hieu quang, nhieu tang
quang ban » quang binh, quang tuan, quang tran
quan ban » qua ban, quan van, luan ban
cong tan » cong tac, cong san, cong thanh
tran cau » tran chau, toan cau, ran cau
ho hieu » ho chieu, hoi hieu, nho hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - hanh trinh ((quan ban) or (quang ban)) cong tan tran cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - hanh trinh ((quan ban) OR (quang ban)) cong tan tran cau*.