Perhaps you should try some spelling variations:
sach doanh » sach tranh, cac doanh, san doanh
hoach dinh » hoang dinh
sach danh » sach tranh, sach dao, sach dung
danh tai » dinh tai, hanh tai, anh tai
te hoach » ke hoach, thu hoach, te hoc
dinh tri » chinh tri
te sach » toc sach

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: (((( te sach doanh tai ) OR ( te sach danh tai ))) OR ( te hoach dinh tri ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((( te sach doanh tai ) OR ( te sach danh tai ))) or ( te hoach dinh tri ))~".
• Adding a wildcard symbol may retrieve word variants: (((( te sach doanh tai ) OR ( te sach danh tai ))) or ( te hoach dinh tri ))*.