Perhaps you should try some spelling variations:
thanh trong » thanh trung, tranh trong, hanh trong
chieu tinh » trieu tinh, lieu tinh, chau tinh
hieu lang » chieu sang, hieu quang, nhieu tang
cong dung » cuong dung, cong dong, cong luong
dung cong » dung trong
cong luan » tong luan, cong tuan, dong luan

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 tinh) or (hieu lang)) - thanh trong cong dung cong luan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu tinh) OR (hieu lang)) - thanh trong cong dung cong luan van ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu tinh) or (hieu lang)) - thanh trong cong dung cong luan van ban*.