Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh di » thanh doi, thanh de, thanh do
te sach » toc sach
nang ma » tang ma, sang ma, nang cao
cua tre » cuu tre, cua triet, dua tren
va cham » va chat, va tham
cua te » cua tu
y nang » ky nang, ly nang, v nang
va cam » va cac, va cao, va cai
ma hoi » mai hoi, xa hoi, ma hoa

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 y nang ma hoi. hieu ((va cam) or (va cham)) dia ban thanh di ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang ma hoi. hieu ((va cam) OR (va cham)) dia ban thanh di ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang ma hoi. hieu ((va cam) or (va cham)) dia ban thanh di ((cua tre) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: te sach y nang ma hoi. hieu ((va cam) or (va cham)) dia ban thanh di ((cua tre) OR (cua te))*.