Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
hanh dai » hanh tai, hanh dao, vanh dai
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
xuc van » duc van, luc van, xuc ban
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cai, ve cau
va cam » va cham, va cac, va cao
ve cac » va cac, vien cac

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: tu sach ky nang xa hoi. hieu ((((ve cam) OR (va cam))) OR (ve cac)) xuc van hanh dai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. hieu ((((ve cam) OR (va cam))) or (ve cac)) xuc van hanh dai cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu ((((ve cam) OR (va cam))) or (ve cac)) xuc van hanh dai cua tre*.