Perhaps you should try some spelling variations:
dao nghiep » day nghiep, khao nghiep, lam nghiep
nghiep dai » nghiep tai, nghiep bai, nghiep va
sach trac » sach truc, sach tranh, sach tham
nghiem te » nghiem de, nghiem ve, nghiem tien
toc sach » hoc sach, doc sach, thuoc sach
sach dao » lanh dao
thu sach » tu sach, thuat sach, thuoc sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( toc sach dao nghiep dai hoc ) or ( thu sach trac nghiem te hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( toc sach dao nghiep dai hoc ) OR ( thu sach trac nghiem te hoc ))*.