Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
hieu manh » chieu xanh, hieu nganh, dieu hanh
cua dung » cua dong, qua dung, cua rung
cua dang » cua cong, cua ban
cong tan » cong tac, cong san, cong thanh
tan ran » tan tran, tan van, tan san
ran cau » van cau, ban cau, can 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 ((hieu manh) OR (chieu sang)) - canh tranh ((cua dung) OR (cua dang)) cong tan ran cau~.
• Adding a wildcard symbol may retrieve word variants: theo ((hieu manh) or (chieu sang)) - canh tranh ((cua dung) or (cua dang)) cong tan ran cau*.