Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
thanh tung » thanh cong
nhan thong » nhan trong, nha thong, nhan khong
doi chieu » doc hieu, doi chi, ho chieu
cong luan » tong luan, dong luan, cong luong
cong tuan » cong tan, cong thanh, cong quang

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 - ((thanh trung) OR (thanh tung)) nhan thong ((cong luan) OR (cong tuan)) van ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu xanh - ((thanh trung) or (thanh tung)) nhan thong ((cong luan) OR (cong tuan)) van ban~".
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - ((thanh trung) or (thanh tung)) nhan thong ((cong luan) OR (cong tuan)) van ban*.