Perhaps you should try some spelling variations:
tran thanh » ban thanh, van thanh, quan thanh
hanh trinh » canh tranh, hanh chinh
ghep nhung » nghiep nhung, hee nhung
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap
tan » toan, tuan, tang

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tan tran thanh - hanh trinh ((ghep nhung) OR (thep khung)) cong dan than cau~.
• Adding a wildcard symbol may retrieve word variants: tan tran thanh - hanh trinh ((ghep nhung) or (thep khung)) cong dan than cau*.