Perhaps you should try some spelling variations:
tien nghiep » trien nghiep, bien nghien, thien nghich
vien nghien » lieu nghien
nghiem ban » nghiem van, nghiem xuan, nghiep bang
tu sach » thu sach, su sach, tu cach
dan hoc » van hoc, dan toc, dai hoc
te sach » toc sach
ban hoc » bang hoc, van hoc, bai hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu sach ((tien nghiep) or (vien nghien)) dan hoc ) or ( te sach (kinh OR dinh) nghiem ban hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach ((tien nghiep) OR (vien nghien)) dan hoc ) OR ( te sach (kinh OR dinh) nghiem ban hoc )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( tu sach ((tien nghiep) or (vien nghien)) dan hoc ) or ( te sach (kinh OR dinh) nghiem ban hoc ))".
• Adding a wildcard symbol may retrieve word variants: (( tu sach ((tien nghiep) or (vien nghien)) dan hoc ) or ( te sach (kinh OR dinh) nghiem ban hoc ))*.