Perhaps you should try some spelling variations:
chiet tach » chieu sach
dung cong » dung trong
ho chiet » ho chieu, ho thiet, hoc thiet
trung va » truong va, trang va, trung ha
tran van » luan van
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

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 - thanh ((trung va) or (tran van)) dung cong dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - thanh ((trung va) OR (tran van)) dung cong dan than cau.
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - thanh ((trung va) or (tran van)) dung cong dan than cau*.