Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu xanh » chieu sach, chieu sang, chieu tinh
thong cong » tong cong, thong thong, phong chong
thanh ta » thanh tra, thanh tai, thanh tay
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, than cap
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: theo chieu xanh - thanh ta van ((thong cong) or (trong cong)) dan than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu xanh - thanh ta van ((thong cong) OR (trong cong)) dan than cao.
• Adding a wildcard symbol may retrieve word variants: theo chieu xanh - thanh ta van ((thong cong) or (trong cong)) dan than cao*.