Perhaps you should try some spelling variations:
va thanh » ban thanh, va tinh, le thanh
te sach » toc sach
sach ky » sac ky, sach y, sach ty
cua tre » cua te, cuu tre, cua triet
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
va cao » va cac, va co, va dao
va cai » va cac, va bai, va dai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky lang xa hoi. hieu ((va cai) or (va cao)) tuc ((va thanh) OR (gia thanh)) dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky lang xa hoi. hieu ((va cai) OR (va cao)) tuc ((va thanh) OR (gia thanh)) dai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky lang xa hoi. hieu ((va cai) or (va cao)) tuc ((va thanh) OR (gia thanh)) dai cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky lang xa hoi. hieu ((va cai) or (va cao)) tuc ((va thanh) OR (gia thanh)) dai cua tre*.