Perhaps you should try some spelling variations:
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
manh trung » manh tung, thanh trung, manh hung
nhung cong » dung cong, thong cong, hang cong
trung voi » trung moi, trung vi, trung vo
voi nhung » gioi nhung, va nhung, thi nhung
dan than » dan chan, ban than, dan toan
van than » van thanh, van thang, van tuan

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 sang) OR (chieu sach)) - manh trung voi nhung cong ((dan than) OR (van than)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sang) OR (chieu sach)) - manh trung voi nhung cong ((dan than) or (van than)) cau~".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sang) OR (chieu sach)) - manh trung voi nhung cong ((dan than) or (van than)) cau*.