Perhaps you should try some spelling variations:
thanh trung » thanh tung
nhieu tang » chieu sang, nhiet nang
hieu lang » chieu sang, hieu quang, hieu van
trung cua » truong cua, trung tuan, trung cap
bang dung » dang dung, ban dung, bong dung
cua bang » chua bang, cua ban, cua dang
toan cao » toan ban, toan tap
va toan » van toan, bai toan, tap toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: nho ((hieu lang) or (nhieu tang)) - thanh trung cua bang dung va toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nho ((hieu lang) OR (nhieu tang)) - thanh trung cua bang dung va toan cao.
• Adding a wildcard symbol may retrieve word variants: nho ((hieu lang) or (nhieu tang)) - thanh trung cua bang dung va toan cao*.