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 cap » truong cao, trung tam
tong cong » cong cong, dung cong, dang cong
tap toan » tap doan, tap quan, bai toan
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 cap ((tong cong) or (trong cong)) tap toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc chieu xanh - thanh trung cap ((tong cong) OR (trong cong)) tap toan ban.
• Adding a wildcard symbol may retrieve word variants: toc chieu xanh - thanh trung cap ((tong cong) or (trong cong)) tap toan ban*.