Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
trong vat » trong va, trong dat, trong hoat
trong van » trong cac
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, doi chieu
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
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 - thanh ((trong vat) or (trong van)) dung cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - thanh ((trong vat) OR (trong van)) dung cong dan toan cao.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - thanh ((trong vat) or (trong van)) dung cong dan toan cao*.