Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hieu lang » chieu sang, hieu quang, nhieu tang
manh hang » manh thang, manh hung, minh hang
ban thanh » ban hanh, ban hang
thanh cac » hanh cac, thanh bac, thanh ca
cong ban » cong bang, cong san, cong tan
va nang » van nang, da nang, kha nang

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 (hieu lang)) - manh hang ((va nang) OR (cam nang)) cong ban thanh cac~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) or (hieu lang)) - manh hang ((va nang) OR (cam nang)) cong ban thanh cac~".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (hieu lang)) - manh hang ((va nang) OR (cam nang)) cong ban thanh cac*.