Perhaps you should try some spelling variations:
chiet tach » chieu sach
ho chiet » ho chieu, ho thiet, hoc thiet
he trung » le trung, he thong, do trung
cong tan » cong tac, cong thanh, cong ty
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) or (he trung)) ((cong tan) 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) OR (he trung)) ((cong tan) OR (cong san)) tai tap.
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - hanh chinh ((ve dung) or (he trung)) ((cong tan) or (cong san)) tai tap*.