Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
truong ca » truong cao, trong ca, truong dai
truong va » truong dai, truong cao, truong dao
trong san » trong cac, cong san, dong san
san toan » van toan, dan toan, manh toan
toan cau » toan cao, toan ban, toan tap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu sach) or (hieu qua)) - thanh ((truong ca) or (truong va)) dung trong san toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (hieu qua)) - thanh ((truong ca) OR (truong va)) dung trong san toan cau.
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (hieu qua)) - thanh ((truong ca) or (truong va)) dung trong san toan cau*.