Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
te sach » toc sach
lai cuu » lai cua, lai chau, lai cuoc
va daoh » va danh, va doanh
cac duc » cac du, cao duc, cac dac
van cac » van hac, van cau, van bac
sach ky » sac ky, sach y, sach ty
lai hoi » dai hoi, lai hoa, lai roi
mai hoi » mai khoi, dai hoi, mai doi
cuu tre » cua tre, cau tren, cau treo
va dao » ca dao

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ((mai hoi) OR (lai hoi)). hieu van cac duc ((va daoh) OR (va dao)) lai cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ((mai hoi) OR (lai hoi)). hieu van cac duc ((va daoh) or (va dao)) lai cuu tre~".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ((mai hoi) OR (lai hoi)). hieu van cac duc ((va daoh) or (va dao)) lai cuu tre*.