Perhaps you should try some spelling variations:
dinh vai » dinh van, dinh vi, dinh va
van dinh » van minh, van dich, va dinh
hieu va » lieu va, hieu qua
vai cua » dai cua, hai cua, lai cua
loc van » luoc van, hoc van, lo van
cao loc » cao hoc, cao toc, cao oc
su sach » so sach, vu sach
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
so sanh » do sanh
bo sach » co sach, hoc sach
cua tre » cua te, cuu tre, cua triet
va cao » va cac, va co, va dao

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) or (bo sach))) or (so sanh)) ky lang xa hoi. hieu va cao loc van dinh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((su sach) OR (bo sach))) OR (so sanh)) ky lang xa hoi. hieu va cao loc van dinh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((((su sach) or (bo sach))) or (so sanh)) ky lang xa hoi. hieu va cao loc van dinh vai cua tre*.