Perhaps you should try some spelling variations:
vanh tai » van tai, hanh tai, anh tai
tu sach » thu sach, su sach, te sach
van dai » vanh dai, van dao, van hai
thu dan » thuc dan, thu dang, thu ban
sach ky » sac ky, sach y, sach ty
va cham » va chat, va tham
cua te » cua tu
va cam » va cac, va cao, va cai
nang o » nang co, nang ho, nang ro
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 sach ky nang o hai. hieu ((va cam) OR (va cham)) thu dan ((vanh tai) OR (van dai)) cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang o hai. hieu ((va cam) OR (va cham)) thu dan ((vanh tai) or (van dai)) cua te~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang o hai. hieu ((va cam) OR (va cham)) thu dan ((vanh tai) or (van dai)) cua te*.