Perhaps you should try some spelling variations:
sach tranh » canh tranh
doanh tren » doanh tien, doanh trong, dinh tren
tranh tien » thanh tien, tran tien, trinh tien
cac doanh » cac dan, cac dang, van doanh
cao dinh » cao minh, dao dinh, cao danh
toc sach » hoc sach, doc sach, thuoc sach
co dinh » do dinh
hoc cac » hoc cao

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (((( hoc ((cao dinh) OR (co dinh)) tri ) OR ( hoc cac doanh tren ))) OR ( toc sach tranh tien ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((( hoc ((cao dinh) OR (co dinh)) tri ) or ( hoc cac doanh tren ))) or ( toc sach tranh tien ))~".
• Adding a wildcard symbol may retrieve word variants: (((( hoc ((cao dinh) OR (co dinh)) tri ) or ( hoc cac doanh tren ))) or ( toc sach tranh tien ))*.