Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, nhieu tang
phuong dan » phuong danh, phuong doan, huong dan
hieu lang » hieu quang, nhieu tang, hieu van
trung cap » truong cao, trung tam
cap bang » cao bang, can bang, lap bang
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu sang) or (hieu lang)) - thanh trung cap bang phuong dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sang) OR (hieu lang)) - thanh trung cap bang phuong dan than cau*.