Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
ban thanh » ban hanh, ban hang
lang van » dang van, tang van, hoang van
cuu tre » cau tren, cau treo
ky lang » ky nang, ky dang, ky tang
van hoi » van hoa, van hoc, van hoe
cua tre » cua te, cua triet, dua tren
tu ban » thu ban, te ban
te sac » te sach, te cac, te san
va dao » ca dao
sac ky » cac ky, sai ky
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 sac ky lang van hoi. hieu ((va cai) or (va dao)) tu ban thanh dai ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky lang van hoi. hieu ((va cai) OR (va dao)) tu ban thanh dai ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky lang van hoi. hieu ((va cai) or (va dao)) tu ban thanh dai ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: te sac ky lang van hoi. hieu ((va cai) or (va dao)) tu ban thanh dai ((cua tre) OR (cuu tre))*.