Perhaps you should try some spelling variations:
chiet tach » chieu sach
nhung cong » dung cong, thong cong, hang cong
dan chinh » dang chinh, van chinh, ban chinh
lan chinh » luan chinh, van chinh, hanh chinh
ho chiet » ho chieu, ho thiet, hoc thiet
trung va » truong va, trang va, trung tam
trung ha » trung hoc, trung tam, trung cap

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - thanh ((trung va) OR (trung ha)) nhung cong ((dan chinh) OR (lan chinh)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chiet tach - thanh ((trung va) or (trung ha)) nhung cong ((dan chinh) OR (lan chinh)) cau~".
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - thanh ((trung va) or (trung ha)) nhung cong ((dan chinh) OR (lan chinh)) cau*.