Perhaps you should try some spelling variations:
sach doanh » sach danh, cac doanh, san doanh
sach tranh » canh tranh
sach dinh » sach kinh, sach danh, hoach dinh
nuoc sach » nguoi sach, hoc sach, cuoc cach
dinh tri » chinh tri
sach bao » sach dao, sach bai, sach bac
te sach » toc sach

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