Perhaps you should try some spelling variations:
chiet tach » chieu sach
ho chiet » ho chieu, ho thiet, hoc thiet
cong van » cong vang, song van, cong tan
cong san » cong tac
ve dung » ve duong, va dung, te dung
ve rung » le trung, he trung, va trung
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 (ve rung)) ((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) OR (ve rung)) ((cong van) OR (cong san)) tai tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chiet tach - hanh chinh ((ve dung) OR (ve rung)) ((cong van) or (cong san)) tai tap".
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - hanh chinh ((ve dung) OR (ve rung)) ((cong van) or (cong san)) tai tap*.