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
va tham » van tham, va thanh, va thuat
dua ban » dia ban, cua ban, qua ban
va cham » va chat
nang ma » tang ma, sang ma, nang cao
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
va cam » va cac, va cao, va cai
ma hoi » mai hoi, xa hoi, ma hoa
di cua » dai cua, doi cua, de cua

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) OR (va tham)))) dua ban thanh di cua tre~.
• 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) OR (va tham)))) dua ban thanh di cua tre.
• 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) OR (va tham)))) dua ban thanh di cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach y nang ma hoi. hieu ((va cam) or (((va cham) OR (va tham)))) dua ban thanh di cua tre*.