Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
van cham » van chat, van tham, van pham
dinh dai » dinh dat, sinh dai, dinh dao
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
va cham » va chat, va tham
va dinh » van dinh, va kinh, va tinh
cua tre » cua te, cuu tre, cua triet
tuc va » thuc va, truc va, tuc xa

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