Perhaps you should try some spelling variations:
chiet tach » chieu sach
ho chiet » ho chieu, ho thiet, hoc thiet
chinh ve » chinh va, chinh vi, chinh ke
cong van » cong vang, song van, cong tan
cong san » cong tac
ve dung » ve duong, ve rung, va dung
tai tap » bai tap, tai tao, hai 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 chiet tach - hanh chinh ve dung ((cong van) or (cong san)) tai tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - hanh chinh ve dung ((cong van) OR (cong san)) tai tap.
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - hanh chinh ve dung ((cong van) or (cong san)) tai tap*.