Perhaps you should try some spelling variations:
thanh trung » thanh tung
nhieu tang » chieu sang, hieu lang, nhiet nang
toc nhieu » toc thieu, doc hieu, hoc thieu
trung cap » truong cao, trung tam
cong cong » cong dong, 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 nhieu tang - thanh trung cap ((cong cong) or (trong cong)) tap toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc nhieu tang - thanh trung cap ((cong cong) OR (trong cong)) tap toan ban.
• Adding a wildcard symbol may retrieve word variants: toc nhieu tang - thanh trung cap ((cong cong) or (trong cong)) tap toan ban*.