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