Perhaps you should try some spelling variations:
vanh dai » van dai, vanh tai, lanh dao
cua tre » cua te, cuu tre, cua triet
va vanh » va van, va danh, va hanh
va chat » van chat, va phat, cao chat
va cham » va tham
sac ky » cac ky, sai ky
co hoi » co hoc, co loi
xuc va » duc va, tuc va, luc va
tu sac » tu sach, tu cac, tu san
o hoi » o hoc, o hai, o hoa

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