Perhaps you should try some spelling variations:
thi nghiem » thuc nghiem
nghiem ban » nghiem van, nghiem xuan, nghiep bang
nghiem dai » nghiep dai, nghiep tai, nghiem va
nghiem dau » nghiep dau, nghiem va, nghiem lam
hoach thi » hoach thu, hoach toi, hoach thay
sach dao » lanh dao
ban hoc » bang hoc, van hoc, bai hoc
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 thi nghiem ban hoc ) OR ( su sach dao ((nghiem dai) OR (nghiem dau)) hoc ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( thu hoach thi nghiem ban hoc ) or ( su sach dao ((nghiem dai) OR (nghiem dau)) hoc ))~".
• Adding a wildcard symbol may retrieve word variants: (( thu hoach thi nghiem ban hoc ) or ( su sach dao ((nghiem dai) OR (nghiem dau)) hoc ))*.