Perhaps you should try some spelling variations:
sach dinh » sach danh, hoach dinh, xac dinh
thu sach » thuat sach, thuoc sach, thu hoach
dinh tri » chinh tri
dung sai » dung tai, dung va, dung dat
kinh tri » minh tri, tinh tri, chinh tri
su sach » so sach, vu sach
tu sach » te sach, tu cach, vu sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((( thu sach dinh tri ) or ( su sach dung sai ))) or ( tu sach kinh tri ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((( thu sach dinh tri ) OR ( su sach dung sai ))) OR ( tu sach kinh tri ))*.