Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
dung cong » dung trong
thanh lap » thanh san, phan lap, thanh hai
trung ha » trung hoc, trung tam, trung cap
cong dan » cong san, cong tan, huong dan
toan tap » toan ban
ha dung » hai dung, kha dung, nha dung

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (chieu sang)) - thanh trung ha dung cong dan ((thanh lap) OR (toan tap))~.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (chieu sang)) - thanh trung ha dung cong dan ((thanh lap) or (toan tap))*.