Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
dien sach » dien anh
phan dang » phan dau, nhan dan, phan ung
dang luan » dung luan, tang luan, hang luan
luan phan » luan van, luan hoan
phan cong » thanh cong
cong van » cong vang, cong san, song van
van vat » van chat, nhan vat
vat ban » van ban, va ban, vat ran

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((dien sach) or (chieu sach)) - phan dang luan phan cong van vat ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((dien sach) OR (chieu sach)) - phan dang luan phan cong van vat ban*.