Perhaps you should try some spelling variations:
sach doanh » sach tranh, san doanh, hanh doanh
cac doanh » cac dan, cac dang, van doanh
sach danh » sach tranh, sach dung, sach kinh
toc sach » hoc sach, doc sach, thuoc sach
danh tri » dinh tri, thanh tri, danh thin
sach dao » lanh dao
dao thin » dao thi, dao thanh, bao thien

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

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