Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
ban thanh » ban hanh, ban hang
dang xay » dang van, van xay
cua tre » cua te, cuu tre, cua triet
tuc ban » thuc ban, truc ban, tu ban
lang xa » lang ha, lang van
san ky » sang ky, van ky, dan ky
va cai » va cac, va bai, va dai
va dao » ca dao
te san » te ban, ke san, tu san

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

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