Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, nhieu tang
hieu lang » hieu quang, nhieu tang, hieu van
tranh cua » doanh cua, manh cua
dung cong » dung trong
cua dung » cua dang, cua dong, qua dung
cong tac » cong ty
tac tran » tan tran, tac trai, tac tren
tran cau » tran chau, toan cau, ran cau

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