Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hieu manh » hieu nganh, dieu hanh, hien hanh
hang hang » nang hang, cang thang, hung thang
nhanh cau » nhanh cay, thanh chau, nhanh ha
cong tan » cong tac, cong san, cong thanh
song van » hoang van, trong van, duong van
va dung » van dung, va duong, vat dung

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 ((hieu manh) OR (chieu xanh)) - hang hang va dung ((cong tan) OR (song van)) nhanh cau~.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (chieu xanh)) - hang hang va dung ((cong tan) or (song van)) nhanh cau*.