Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
chieu xanh » chieu sach, chieu sang, chieu tinh
hieu lang » chieu sang, hieu quang, nhieu tang
tranh cua » doanh cua, manh cua
cua dung » cua dang, cua dong, qua dung
cong dan » cong san, cong tan, cong dong
toan cau » toan cao, toan ban, toan tap

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: doc ((chieu xanh) OR (hieu lang)) - hanh tranh cua dung ((cong dan) OR (huong dan)) toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((chieu xanh) or (hieu lang)) - hanh tranh cua dung ((cong dan) OR (huong dan)) toan cau~".
• Adding a wildcard symbol may retrieve word variants: doc ((chieu xanh) or (hieu lang)) - hanh tranh cua dung ((cong dan) OR (huong dan)) toan cau*.