Perhaps you should try some spelling variations:
biet nghiep » bien nghien, biet nghi, trien nghiep
nghiep cua » nghiep vua, nghiep luan, nghien cuu
nuoc biet » nuoc viet, nguoi biet, quoc viet
nhung con » nhung cong, nhung don, nhung mon
sach dao » lanh dao
dao nuoc » dat nuoc, dao cuoc, dau nuoc
nhung co » nhung bo, chung co, khung co
su sach » so sach, vu sach
doi vi » doi voi, doi vai, doi va

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach dao nuoc biet nghiep cua ets : ((nhung co) OR (nhung con)) doi vi đai~".
• Adding a wildcard symbol may retrieve word variants: su sach dao nuoc biet nghiep cua ets : ((nhung co) OR (nhung con)) doi vi đai*.