Perhaps you should try some spelling variations:
trong tuan » trong quan, trung tuan, trong tan
chieu xanh » chieu sach, chieu sang, chieu tinh
doi chieu » doc hieu, doi chi, ho chieu
anh sang » lanh sang, anh bang, anh dang
anh dong » anh huong, anh son
van dung » van dong, xay dung, tin dung
tuan van » luan van, tran van, tan van

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 xanh - ((anh sang) OR (anh dong)) van dung trong tuan van ban~.
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - ((anh sang) or (anh dong)) van dung trong tuan van ban*.