Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
sang tao » hang tai
dinh dat » dinh ket, dinh van, dinh lam
dinh dai » sinh dai, dinh dao, dinh tai
tham tuc » tham thuc, thai tuc, nham thuc
sach ty » sach y, sach tu, sach thu
va tham » van tham, va cham, va thanh
sang ma » tang ma, nang ma, mang may
cua tre » cua te, cuu tre, cua triet

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 ty ((sang ma) OR (sang tao)) 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 ty ((sang ma) OR (sang tao)) 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 ty ((sang ma) OR (sang tao)) hoi. lieu va tham tuc xa ((dinh dai) or (dinh dat)) cua tre".
• Adding a wildcard symbol may retrieve word variants: toc sach ty ((sang ma) OR (sang tao)) hoi. lieu va tham tuc xa ((dinh dai) or (dinh dat)) cua tre*.