Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu xanh » chieu sach, chieu sang, chieu tinh
toc chieu » toc thieu, doc hieu, hoc thieu
trung hai » trung ha, trung dai, trong hai
hai dung » hai duong, mai dung, hai dang
cong tac » cong ty
toan cao » toan tap
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc chieu xanh - thanh trung hai dung ((cong tac) or (huong dan)) ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc chieu xanh - thanh trung hai dung ((cong tac) OR (huong dan)) ((toan cao) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: toc chieu xanh - thanh trung hai dung ((cong tac) or (huong dan)) ((toan cao) or (toan ban))*.