Perhaps you should try some spelling variations:
vanh dai » van dai, vanh tai, lanh dao
te sach » toc sach
sach ky » sac ky, sach y, sach ty
va vanh » va van, va danh, va hanh
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cai
va cao » va cac, va co, va dao
xuc va » duc va, tuc va, luc va
x hoi » xa hoi, o hoi, 5 hoi

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: te sach ky nang ((x hoi) OR (x ho)). hieu ((va cam) OR (va cao)) xuc va vanh dai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ((x hoi) OR (x ho)). hieu ((va cam) or (va cao)) xuc va vanh dai cua tre~".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ((x hoi) OR (x ho)). hieu ((va cam) or (va cao)) xuc va vanh dai cua tre*.