Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
truong van » truong va, truong dai, truong cao
trong van » trong cac
dung cong » dung trong
tan thanh » tran thanh, tang thanh, toan thanh
thanh lap » thanh san, phan lap, thanh hai
ho chieu » theo chieu, hoc thieu, doi chieu
cong tan » cong tac, cong san, cong thanh

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 ((truong van) or (trong van)) dung cong tan thanh lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - thanh ((truong van) OR (trong van)) dung cong tan thanh lap.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - thanh ((truong van) or (trong van)) dung cong tan thanh lap*.