Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
va triet » va thiet, va trien, ve triet
sang ma » tang ma, nang ma, sang tao
ty sang » ty xang, ty hang, duy sang
hieu va » lieu va, hieu qua
cao xuc » cam xuc, cao suc, chat xuc
sach ty » sach y, sach tu, sach thu
cao duc » dao duc, cao suc, giao duc
va hanh » van hanh, va thanh, va danh
ma hoi » mai hoi, xa hoi, ma hoa
cua te » cua tu

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: toc sach ty sang ma hoi. hieu va ((cao xuc) OR (cao duc)) va hanh vi ((cua te) OR (va triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ty sang ma hoi. hieu va ((cao xuc) OR (cao duc)) va hanh vi ((cua te) or (va triet))~".
• Adding a wildcard symbol may retrieve word variants: toc sach ty sang ma hoi. hieu va ((cao xuc) OR (cao duc)) va hanh vi ((cua te) or (va triet))*.