Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu xanh » chieu sach, chieu sang, chieu tinh
cac phuong » cac truong
trong van » trong cac
van thanh » ban thanh, van tuan
thanh tap » thanh lap, thanh tai, thanh tay
ho chieu » theo chieu, hoc thieu, doi chieu
va thong » va thuong, va phuong, he thong

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: ho chieu xanh - thanh trung ((va thong) OR (cac phuong)) trong van thanh tap~.
• Adding a wildcard symbol may retrieve word variants: ho chieu xanh - thanh trung ((va thong) or (cac phuong)) trong van thanh tap*.