Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
thien dang » thien bang, thien danh, thien nang
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh chua » tranh cua, trinh chuan, tranh chap
chua xang » chua nang, chuc nang, chu bang
cong dan » cong san, cong tan, cong dong
than cau » toan cau, phan cau, than cap

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: hoc ((chieu xanh) OR (thien dang)) - hanh tranh chua xang ((cong dan) OR (huong dan)) than cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) or (thien dang)) - hanh tranh chua xang ((cong dan) OR (huong dan)) than cau~".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (thien dang)) - hanh tranh chua xang ((cong dan) OR (huong dan)) than cau*.