Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
lang trong » dung trong, cong trong, dong trong
trong chuc » trong thuc, trong chu, trong chuan
ho chieu » theo chieu, hoc thieu, doi chieu
cong van » cong vang, song van, cong tan
cong san » cong tac
van cau » van dau, van hau, van chat

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 - lang trong chuc nang ((cong van) or (cong san)) van cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - lang trong chuc nang ((cong van) OR (cong san)) van cau.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - lang trong chuc nang ((cong van) or (cong san)) van cau*.