Perhaps you should try some spelling variations:
quang thanh » quan thanh, hoang thanh, muong thanh
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
thanh dung » thanh duong, thanh tung, thanh hung
trong dan » trong dang, trong tan, trong ban
trong san » trong cac, cong san, dong san
than ban » thanh ban, toan ban, than man

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((chieu sang) or (chieu sach)) - tinh quang thanh dung ((trong dan) or (trong san)) than ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((chieu sang) OR (chieu sach)) - tinh quang thanh dung ((trong dan) OR (trong san)) than ban.
• Adding a wildcard symbol may retrieve word variants: doc ((chieu sang) or (chieu sach)) - tinh quang thanh dung ((trong dan) or (trong san)) than ban*.