Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, nhieu tang
vap nhung » va nhung, ve nhung, voi nhung
cong vap » cong va, cong lap, cong van
dan phan » doan phan, dan chan, dam phan
van phan » van phong, van thanh, luan phan

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 (hieu lang)) - thanh cong vap nhung cong ((dan phan) OR (van phan)) tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) or (hieu lang)) - thanh cong vap nhung cong ((dan phan) OR (van phan)) tu~".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (hieu lang)) - thanh cong vap nhung cong ((dan phan) OR (van phan)) tu*.