Perhaps you should try some spelling variations:
doanh nghien » doanh nghiep, doanh nghi, doanh ngiep
sach tranh » canh tranh
san doanh » van doanh, toan doanh, vay doanh
nghiem de » nghiem d, nghiem do, nghiem te
nghien d » nghiem d, nghien o, nghiem do
cuu hoc » cua hoc, cuu thuoc, cuu khoa
su sach » so sach, vu sach
so san » so sanh, ho san, so ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( so san doanh nghien cuu hoc ) or ( su sach tranh ((nghien d) or (nghiem de)) hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( so san doanh nghien cuu hoc ) OR ( su sach tranh ((nghien d) OR (nghiem de)) hoc )).
• Adding a wildcard symbol may retrieve word variants: (( so san doanh nghien cuu hoc ) or ( su sach tranh ((nghien d) or (nghiem de)) hoc ))*.