Perhaps you should try some spelling variations:
dinh dai » dinh dat, sinh dai, dinh dao
su sach » so sach, vu sach
hieu he » hieu ve, hiem he, hieu le
thu gia » thue gia, phu gia, thue giao
cua tre » cua te, cuu tre, cua triet
y nang » ly nang, v nang, may nang
ma hoi » mai hoi, xa hoi, ma hoa
he nam » ha nam, nghe nam

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((y nang) or (ky nang)) ma hoi. hieu he nam thu gia dinh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((y nang) OR (ky nang)) ma hoi. hieu he nam thu gia dinh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ((y nang) or (ky nang)) ma hoi. hieu he nam thu gia dinh dai cua tre*.