Perhaps you should try some spelling variations:
cong cong » cong dong, trong cong, dung cong
hoc hieu » hoc thieu, hoc hien, doc hieu
thanh ta » thanh tra, thanh tai, thanh tay
van cong » van dong, van phong, phan cong
cong dan » cong san, cong tan, huong dan
dan doan » dan toan, tan doan, van doan
ta van » tan van, tap van, va van

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: ((hoc hieu) OR (toc thieu)) manh - thanh ta van cong cong dan doan va~.
• Adding a wildcard symbol may retrieve word variants: ((hoc hieu) or (toc thieu)) manh - thanh ta van cong cong dan doan va*.