Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
hanh dai » hanh tai, hanh dao, vanh dai
va thanh » gia thanh, ban thanh, va tinh
dai cuu » dai cua, dai huu
va hanh » van hanh, va danh, ban hanh
cuu tre » cua tre, cau tren, cau treo
va tham » van tham, va cham, va thuat
mai hoi » mai khoi, dai hoi, lai hoi
y nang » ky nang, ly nang, v nang
tuc va » thuc va, truc va, tuc xa
ma hoi » xa hoi, ma hoa, me hoi

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: toc sach y nang ((ma hoi) OR (mai hoi)). lieu ((va tham) OR (va thanh)) tuc va hanh dai cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach y nang ((ma hoi) OR (mai hoi)). lieu ((va tham) or (va thanh)) tuc va hanh dai cuu tre~".
• Adding a wildcard symbol may retrieve word variants: toc sach y nang ((ma hoi) OR (mai hoi)). lieu ((va tham) or (va thanh)) tuc va hanh dai cuu tre*.