Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doc chieu » doc hieu, doi chieu, toc thieu
dang cong » dung cong
trang va » hang va
tran van » luan van
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban 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: doc chieu sach - canh ((trang va) or (tran van)) dang cong tan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc chieu sach - canh ((trang va) OR (tran van)) dang cong tan than cau.
• Adding a wildcard symbol may retrieve word variants: doc chieu sach - canh ((trang va) or (tran van)) dang cong tan than cau*.