Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hieu vat » nhieu vat, hieu va, hieu van
dinh toi » dinh tri, dinh thi, dinh so
dinh moi » dinh so, dinh tri, dinh thi
su triet » su viet, su tien, ve triet
vat hau » van hau, hat chau, vat chat
xuc va » duc va, luc va, xac va
sach v » sach va, sach y, sach 2
tuc va » thuc va, truc va, tuc xa
v nang » va nang, vu nang, van nang
x hoi » xa hoi, o hoi, x ho

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 v nang x hoi. hieu vat hau ((xuc va) OR (tuc va)) ((dinh moi) or (dinh toi)) su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach v nang x hoi. hieu vat hau ((xuc va) OR (tuc va)) ((dinh moi) OR (dinh toi)) su triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach v nang x hoi. hieu vat hau ((xuc va) OR (tuc va)) ((dinh moi) or (dinh toi)) su triet*".