Perhaps you should try some spelling variations:
dinh dai » dinh dat, sinh dai, dinh dao
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
va dinh » van dinh, va kinh, va tinh
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cai
va cao » va cac, va co, va dao
xuc va » duc va, tuc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ky nang xa hoi. hieu ((va cam) OR (va cao)) xuc va dinh dai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky nang xa hoi. hieu ((va cam) OR (va cao)) xuc va dinh dai cua tre".
• Adding a wildcard symbol may retrieve word variants: so sach ky nang xa hoi. hieu ((va cam) OR (va cao)) xuc va dinh dai cua tre*.