Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
thanh dung » thanh duong, thanh tung, thanh hung
tong nhung » thong nhung, trong nhung, song nhung
cho tong » cho trong, cho tuong, cho cong
bai than » bai toan, bay than, tai thanh
ban than » ban thanh, van thanh, ban hang

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: ho ((chieu sach) OR (chieu sang)) - thanh dung cho tong nhung ((bai than) OR (ban than)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) or (chieu sang)) - thanh dung cho tong nhung ((bai than) OR (ban than)) cau~".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (chieu sang)) - thanh dung cho tong nhung ((bai than) OR (ban than)) cau*.