Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
nham thuc » nhan thuc, nam thuc, nham thu
tham tuc » tham thuc, thai tuc, pham thuc
dinh dai » dinh dat, sinh dai, dinh dao
va dinh » van dinh, va kinh, va tinh
cua tre » cua te, cuu tre, cua triet
y nang » ly nang, v nang, may nang
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: thuoc sach ((y nang) OR (ky nang)) ma hoi. lieu va ((tham tuc) or (nham thuc)) va dinh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ((y nang) OR (ky nang)) ma hoi. lieu va ((tham tuc) OR (nham thuc)) va dinh dai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ((y nang) OR (ky nang)) ma hoi. lieu va ((tham tuc) or (nham thuc)) va dinh dai cua tre".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ((y nang) OR (ky nang)) ma hoi. lieu va ((tham tuc) or (nham thuc)) va dinh dai cua tre*.