Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
doi chieu » doc hieu, doi chi, ho chieu
canh tran » canh tranh, hanh trang, banh trang
dung dong » dung cong, dung trong, cong dong
vung dong » cong dong
tran van » luan van
van tan » van tuan, van tai, van thanh

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 - canh tran van ((dung dong) OR (vung dong)) ((van tan) OR (van ban)) tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu xanh - canh tran van ((dung dong) or (vung dong)) ((van tan) OR (van ban)) tap~".
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - canh tran van ((dung dong) or (vung dong)) ((van tan) OR (van ban)) tap*.