Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
dinh dai » dinh dat, sinh dai, dinh dao
nang xa » nang x, lang xa, nang ma
va cham » va chat, va tham
thuc va » thuc vat, thuc dan, thuc day
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
tuc va » truc va, tuc xa, duc va

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 y nang xa hoi. lieu va cham ((tuc va) OR (thuc va)) dinh dai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach y nang xa hoi. lieu va cham ((tuc va) OR (thuc va)) dinh dai cua tre".
• Adding a wildcard symbol may retrieve word variants: toc sach y nang xa hoi. lieu va cham ((tuc va) OR (thuc va)) dinh dai cua tre*.