Perhaps you should try some spelling variations:
khao nghiep » khao nghiem, khoi nghiep, thuat nghiep
thi nghiem » thuc nghiem
nghiem ban » nghiem van, nghiem xuan, nghiep bang
dao nghiep » day nghiep, lam nghiep, cac nghiep
hoach thi » hoach thu, hoach toi, hoach thay
ban hoc » bang hoc, van hoc, bai hoc
su sach » so sach, vu sach
va hoc » van hoc

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( thu hoach thi nghiem ban hoc ) OR ( su sach ((dao nghiep) OR (khao nghiep)) va hoc ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( thu hoach thi nghiem ban hoc ) or ( su sach ((dao nghiep) OR (khao nghiep)) va hoc ))~".
• Adding a wildcard symbol may retrieve word variants: (( thu hoach thi nghiem ban hoc ) or ( su sach ((dao nghiep) OR (khao nghiep)) va hoc ))*.