Perhaps you should try some spelling variations:
sach tranh » canh tranh
sanh doanh » san doanh, hanh doanh, doanh doanh
nghiep tu » nghiep vu, nghiep vua, nghiep cua
nghiem de » nghiem d, nghiem te, nghiem ve
nghiem h » nghiem _, nghiem d, nghiem y
vu sach » vu bach, su sach, vu khach
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: (( do sanh doanh nghiep tu hoc ) or ( vu sach tranh ((nghiem de) or (nghiem h)) hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( do sanh doanh nghiep tu hoc ) OR ( vu sach tranh ((nghiem de) OR (nghiem h)) hoc )).
• Adding a wildcard symbol may retrieve word variants: (( do sanh doanh nghiep tu hoc ) or ( vu sach tranh ((nghiem de) or (nghiem h)) hoc ))*.