Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
doi chieu » doc hieu, doi chi, mot chieu
van thong » van thuong, van phong, va thong
ho chieu » theo chieu, hoc thieu, mot chieu
thanh ta » thanh tra, thanh tai, thanh tay
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » toan cao, toan ban, toan tap
ta van » tan van, tap van, va van

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (doi chieu)) xanh - thanh ta van thong cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chieu)) xanh - thanh ta van thong cong tac toan cau.
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (doi chieu)) xanh - thanh ta van thong cong tac toan cau*.