Perhaps you should try some spelling variations:
dinh vai » dinh van, dinh vi, dinh va
so sach » bo sach, co sach, hoc sach
so sanh » do sanh
hieu va » lieu va, hieu qua
cam duc » cam xuc, cao duc, pham duc
va dinh » van dinh, va kinh, va tinh
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao
x hoi » xa hoi, o hoi, x ho

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) OR (so sanh)) ky nang x hoi. hieu va cam duc va dinh vai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) OR (so sanh)) ky nang x hoi. hieu va cam duc va dinh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((so sach) OR (so sanh)) ky nang x hoi. hieu va cam duc va dinh vai cua tre*.