Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, doi chieu
cong tac » cong ty
tac dung » sach dung, xay dung, tin dung
van tuan » van quan, van ban, anh tuan
van tan » van ban, van tai, van 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 cong tac dung cong ((van tan) or (van tuan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - thanh cong tac dung cong ((van tan) OR (van tuan)) cau.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - thanh cong tac dung cong ((van tan) or (van tuan)) cau*.