Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
va thanh » gia thanh, ban thanh, va tinh
hieu van » hieu va, thien van, lieu va
nang lai » nang tai, mang lai, nang cai
hieu ve » hieu va
sach ky » sac ky, sach y, sach ty
cac xuc » cam xuc, cac nuoc, chat xuc
lai hoi » dai hoi, lai hoa, lai roi
hai cua » thai cua, hoi cua, lai cua
xuc va » duc va, tuc va, luc va

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: hoc sach ky nang lai hoi. ((hieu ve) OR (hieu van)) cac xuc va thanh ((dai cua) OR (hai cua)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach ky nang lai hoi. ((hieu ve) OR (hieu van)) cac xuc va thanh ((dai cua) or (hai cua)) tre~".
• Adding a wildcard symbol may retrieve word variants: hoc sach ky nang lai hoi. ((hieu ve) OR (hieu van)) cac xuc va thanh ((dai cua) or (hai cua)) tre*.