Perhaps you should try some spelling variations:
sach doanh » sach danh, cac doanh, san doanh
sach tranh » canh tranh
doanh tri » doanh tai, doanh tren, dinh tri
tranh tri » trang tri, thanh tri, tran tri
dong tri » dong tai, dung tri, dong thi
doc sach » toc sach, nuoc sach, dac sac
hoc sach » hoc sinh, hoc cac, hoc anh
toc van » hoc van, toc san, tac van

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((( toc van dong tri ) or ( doc sach doanh tri ))) or ( hoc sach tranh tri ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((( toc van dong tri ) OR ( doc sach doanh tri ))) OR ( hoc sach tranh tri )).
• Adding a wildcard symbol may retrieve word variants: (((( toc van dong tri ) or ( doc sach doanh tri ))) or ( hoc sach tranh tri ))*.