Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
thanh dung » thanh duong, thanh tung, thanh hung
cua phuong » cuu phuong, cuc phuong, luan phuong
doi chieu » doc hieu, doi chi, mot chieu
trong dan » trong dang, trong tan, trong ban
trong san » trong cac, cong san, dong san
dung cua » dung luan, dung cho

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

• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - thanh dung cua phuong ((trong dan) OR (trong san)) van ban~.
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - thanh dung cua phuong ((trong dan) or (trong san)) van ban*.