Perhaps you should try some spelling variations:
thanh trung » thanh tung
hanh trinh » canh tranh, hanh chinh
hieu lang » chieu sang, hieu quang, nhieu tang
cua dong » chua dong, cua cong, cua dang
cong tac » cong ty
toan cao » toan ban, toan tap
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 - ((thanh trung) or (hanh trinh)) cua dong ((cong san) or (cong tac)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - ((thanh trung) OR (hanh trinh)) cua dong ((cong san) OR (cong tac)) toan cao.
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - ((thanh trung) or (hanh trinh)) cua dong ((cong san) or (cong tac)) toan cao*.