Perhaps you should try some spelling variations:
trien nghiep » trinh nghien, vien nghien, bien nghien
tham nghiem » trac nghiem, thi nghiem, thuc nghiem
sach trien » sach tien, sach tren, sach thieu
nghiep ye » nghiep ke, nghiep y, nghiep he
sach tham » sach nha
nghiem d » nghiem de, nghiem do, nghiem _
su sach » vu sach
so sach » so sanh, bo sach, co sach
ye hoc » y hoc, te hoc, de hoc
d hoc » du hoc, ad hoc, de hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( su sach trien nghiep ye hoc ) or ( so sach tham nghiem d hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su sach trien nghiep ye hoc ) OR ( so sach tham nghiem d hoc )).
• Adding a wildcard symbol may retrieve word variants: (( su sach trien nghiep ye hoc ) or ( so sach tham nghiem d hoc ))*.