Perhaps you should try some spelling variations:
theo chieu » ho chieu, theo chu, thi chieu
thong cong » trong cong, tong cong, thong thong
van thong » van thuong, van phong, va thong
thanh ta » thanh tra, thanh tai, thanh tay
cong san » cong tac
san tang » san sang, son tang, fan tang
tang ca » tang cua, hang ca, tang ma
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: ((theo chieu) OR (theo tieu)) xanh - thanh ta van thong cong san tang ca~.
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (theo tieu)) xanh - thanh ta van thong cong san tang ca*.