Perhaps you should try some spelling variations:
thuat nghiep » thuat nhiet, thuat ghep, thuc nghiem
sach thuat » sach tham, dich thuat, cac thuat
nghiep cua » nghiep vua, nghiep luan, nghien cuu
cua thuoc » nha thuoc, cay thuoc, cua nuoc
sach thi » sach thu, sach tai, sach tham
nghiem d » nghiem de, nghiem do, nghiem _
vu sach » vu bach, su sach, vu khach
d hoc » du hoc, ad hoc, de 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: (( su ((sach thi) OR (sach thieu)) nghiem d hoc ) OR ( vu sach thuat nghiep cua thuoc ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( su ((sach thi) OR (sach thieu)) nghiem d hoc ) or ( vu sach thuat nghiep cua thuoc ))~".
• Adding a wildcard symbol may retrieve word variants: (( su ((sach thi) OR (sach thieu)) nghiem d hoc ) or ( vu sach thuat nghiep cua thuoc ))*.