Perhaps you should try some spelling variations:
toc sach » hoc sach, thuoc sach, nuoc sach
tham tuc » tham thuc, thai tuc, nham thuc
dinh dat » dinh ket, dinh van, dinh lam
dinh dai » sinh dai, dinh dao, dinh tai
doc sach » hoc sach, nuoc sach, dac sac
ty sang » ty xang, ty hang, duy sang
sang ma » tang ma, nang ma, sang tao
va tham » van tham, va cham, va thanh
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sach) OR (doc sach)) ty sang ma hoi. lieu va tham tuc xa ((dinh dai) or (dinh dat)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (doc sach)) ty sang ma hoi. lieu va tham tuc xa ((dinh dai) OR (dinh dat)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) OR (doc sach)) ty sang ma hoi. lieu va tham tuc xa ((dinh dai) or (dinh dat)) cua tre".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) OR (doc sach)) ty sang ma hoi. lieu va tham tuc xa ((dinh dai) or (dinh dat)) cua tre*.