Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
su sach » vu sach
van hac » van hoc, van ha, van hai
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
van cac » van cau, van bac, dan cac
nang xa » nang x, lang xa, nang ma
so sach » so sanh, bo sach, co sach
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) y nang xa hoi. hieu ((van cac) OR (van hac)) thuc va hanh vai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (so sach)) y nang xa hoi. hieu ((van cac) or (van hac)) thuc va hanh vai cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (so sach)) y nang xa hoi. hieu ((van cac) or (van hac)) thuc va hanh vai cua tre*.