Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hieu lang » chieu sang, hieu quang, nhieu tang
trinh van » trinh han, trinh quan, trinh toan
hoc hieu » hoc thieu, hoc hien, doc hieu
van bang » van ban, van nang, von bang
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
tran ban » tranh ban, tran van, toan ban

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 trinh van bang ((cong tan) or (cong san)) tran ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu lang - hanh trinh van bang ((cong tan) OR (cong san)) tran ban.
• Adding a wildcard symbol may retrieve word variants: hoc hieu lang - hanh trinh van bang ((cong tan) or (cong san)) tran ban*.