Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hieu lang » chieu sang, hieu quang, nhieu tang
vat hang » van hang, va hang, mat hang
dat hang » dat khanh, dat quang, tat thang
cong tan » cong tac, cong san, cong thanh
ho hieu » ho chieu, hoi hieu, nho hieu
ban cau » bang cau, ban can, ban dau
van cau » van dau, van hau, van chat

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