Perhaps you should try some spelling variations:
tranh nghiep » doanh nghiep, trinh nghien, trac nghiem
tranh nghiem » trac nghiem, trinh nghien, trai nghiem
trach nhiem » trac nghiem
sanh tranh » canh tranh, sach tranh, lanh tranh
nghiep tu » nghiep vu, nghiep vua, nghiep cua
so sanh » do sanh
vu sach » vu bach, su sach, vu khach
tu hoc » te 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: (( so sanh tranh nghiep tu hoc ) or ( vu sach ((tranh nghiem) or (trach nhiem)) d hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( so sanh tranh nghiep tu hoc ) OR ( vu sach ((tranh nghiem) OR (trach nhiem)) d hoc )).
• Adding a wildcard symbol may retrieve word variants: (( so sanh tranh nghiep tu hoc ) or ( vu sach ((tranh nghiem) or (trach nhiem)) d hoc ))*.