Perhaps you should try some spelling variations:
trong quang » truong quang, thong quang, trong quan
thanh trong » thanh trung, tranh trong, hanh trong
chieu sang » chieu sach, chieu xanh, hieu lang
quang dung » quang trung, ung dung, cuong dung
trong mach » trong cac, trong minh, trong anh
mach toan » manh toan, hach toan, mach tuan
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu sang) or (hieu qua)) - thanh trong quang dung trong mach toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (hieu qua)) - thanh trong quang dung trong mach toan tap*.