Perhaps you should try some spelling variations:
thanh trung » thanh tung
nhieu tang » chieu sang, nhiet nang
trung tuan » trung thanh, trung tam, tran tuan
hieu lang » chieu sang, hieu quang, hieu van
tuan dang » tran dang, tuan bang, tuan dung
dang cong » dung cong
van toan » van tuan, van tan, van thanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu lang) or (nhieu tang)) - thanh trung tuan dang cong ((van toan) or (tinh toan)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu lang) OR (nhieu tang)) - thanh trung tuan dang cong ((van toan) OR (tinh toan)) ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu lang) or (nhieu tang)) - thanh trung tuan dang cong ((van toan) or (tinh toan)) ban*.