Perhaps you should try some spelling variations:
trinh quang » tinh quang, trinh quan, tranh quang
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
canh trinh » canh tranh, hanh trinh, canh tinh
quang dung » quang trung, ung dung, cuong dung
trong luan » truong luan, tong luan, trong quan
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 xanh) or (chieu sang)) - canh trinh quang dung trong luan van cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu xanh) OR (chieu sang)) - canh trinh quang dung trong luan van cau*.