Perhaps you should try some spelling variations:
tranh nghien » trinh nghien, trong nghien, truong nghien
danh nghiep » doanh nghiep, day nghiep, doanh ngiep
tron nghien » trong nghien, tro nghien, truong nghien
sach danh » sach tranh, sach dao, sach dung
nghiep tu » nghiep vu, nghiep vua, nghiep cua
vu khach » vu khanh, vu khac, vay khach
so sach » so sanh, bo sach, co sach
tu hoc » te hoc
d hoc » du hoc, ad hoc, de hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( so sach danh nghiep tu hoc ) or ( vu khach ((tranh nghien) or (tron nghien)) d hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( so sach danh nghiep tu hoc ) OR ( vu khach ((tranh nghien) OR (tron nghien)) d hoc )).
• Adding a wildcard symbol may retrieve word variants: (( so sach danh nghiep tu hoc ) or ( vu khach ((tranh nghien) or (tron nghien)) d hoc ))*.