Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
nhiet nang » nhiet dong, viet nang, nhieu tang
canh doanh » hanh doanh, chinh doanh, doanh doanh
doanh luan » doanh nhan
luan nang » luan van, van nang, luan san
nang cong » nang song, dang cong, bang cong
tap phan » cap phan, tap pham, phap phan
tai phan » tai thanh, tai phong, tai ngan

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu sach) or (nhiet nang)) - canh doanh luan nang cong ((tap phan) OR (tai phan)) dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sach) OR (nhiet nang)) - canh doanh luan nang cong ((tap phan) OR (tai phan)) dau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sach) or (nhiet nang)) - canh doanh luan nang cong ((tap phan) OR (tai phan)) dau".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sach) or (nhiet nang)) - canh doanh luan nang cong ((tap phan) OR (tai phan)) dau*.