Perhaps you should try some spelling variations:
vanh dai » van dai, vanh tai, lanh dao
va vanh » va van, va danh, va hanh
cua tre » cua te, cuu tre, cua triet
tu sac » tu sach, tu san, tu bac
nang o » nang co, nang ho, nang ro
va cam » va cham, va cac, va cai
va cao » va cac, va co, va dao
tuc va » thuc va, truc va, tuc xa
o hai » co hai, so hai, o lai

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 sac) OR (tu cac)) ky nang o hai. hieu ((va cam) OR (va cao)) tuc va vanh dai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sac) or (tu cac)) ky nang o hai. hieu ((va cam) OR (va cao)) tuc va vanh dai cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((tu sac) or (tu cac)) ky nang o hai. hieu ((va cam) OR (va cao)) tuc va vanh dai cua tre*.