Perhaps you should try some spelling variations:
tranh nghiep » doanh nghiep, trinh nghien, trac nghiem
trach nhiem » trac nghiem
sach tranh » canh tranh
sach trach » sach truc, sat trach
nghiep du » nghiep dau, nghiep vu, nghiep tu
nhiem ban » nghiem ban, nghiem van, nghiep ban
te sach » toc sach
su sach » so sach, vu sach
ban hoc » bang hoc, van hoc, bai hoc
du hoc » tu hoc, duoc hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( te sach tranh nghiep du hoc ) or ( su sach trach nhiem ban hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( te sach tranh nghiep du hoc ) OR ( su sach trach nhiem ban hoc ))*.