Perhaps you should try some spelling variations:
thu nghiem » thuc nghiem, thi nghiem
dao nghiep » day nghiep, khao nghiep, lam nghiep
hoach thu » hoach thay, doanh thu, hoach su
nghiep va » nghiep vu
sach dao » lanh dao
dan hoc » dan toc, dai hoc, toan hoc
van hoc » van hoa
su sach » so sach, vu sach

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 thu nghiem ((dan hoc) OR (van hoc)) ) OR ( su sach dao nghiep va hoc ))~.
• Adding a wildcard symbol may retrieve word variants: (( thu hoach thu nghiem ((dan hoc) or (van hoc)) ) or ( su sach dao nghiep va hoc ))*.