Perhaps you should try some spelling variations:
phan thong » phan thuong, phan hong, phan tong
cdien sach » chieu sach, kien sach
dien sach » dien anh
phan cong » thanh cong
cong luan » tong luan, cong tuan, dong luan
luan phan » luan van, luan hoan
thong van » trong van, thong va, thong quan
van van » tan van, san van, van vat

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 (cdien sach)) - phan cong luan phan thong van van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((dien sach) OR (cdien sach)) - phan cong luan phan thong van van ban*.