Perhaps you should try some spelling variations:
tranh nhiem » trach nhiem, trinh nhiet
tham nghiep » thuat nghiep, lam nghiep, tam nghien
sach tranh » canh tranh
nhiem duoc » nghiem duoc, hiem duoc, nhiem cuoc
sach tham » sach nha
nghiep tu » nghiep vu, nghiep vua, nghiep cua
duoc hoc » quoc hoi
su sach » so sach, vu sach
tu hoc » te 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 tham nghiep tu hoc ) or ( su sach tranh nhiem duoc hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su sach tham nghiep tu hoc ) OR ( su sach tranh nhiem duoc hoc )).
• Adding a wildcard symbol may retrieve word variants: (( su sach tham nghiep tu hoc ) or ( su sach tranh nhiem duoc hoc ))*.