Perhaps you should try some spelling variations:
trinh quang » tinh quang, trinh quan, tranh quang
canh trinh » canh tranh, hanh trinh, canh tinh
chieu sach » chinh sach, chiet tach, chieu sang
quang dung » quang trung, ung dung, cuong dung
trong luan » truong luan, tong luan, trong quan
hieu lang » chieu sang, hieu quang, nhieu tang
van cau » van dau, van hau, van chat

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu sach) or (hieu lang)) - canh trinh quang dung trong luan van cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sach) OR (hieu lang)) - canh trinh quang dung trong luan van cau*.