Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
hanh dai » hanh tai, hanh dao, vanh dai
ty chang » ty hang, ty chung, thi chang
chang xu » chang xue, chao xu, thong xu
cac xuc » cam xuc, cac nuoc, chat xuc
hieu va » lieu va, hieu qua
cuu tre » cua tre, cau tren, cau treo
xuc va » duc va, tuc va, luc va
xu hoi » xa hoi, lu hoi, vu 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: ((te sach) OR (toc sach)) ty chang xu hoi. hieu va cac xuc va ((hanh dai) OR (lanh dao)) cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) ty chang xu hoi. hieu va cac xuc va ((hanh dai) or (lanh dao)) cuu tre~".
• Adding a wildcard symbol may retrieve word variants: ((te sach) OR (toc sach)) ty chang xu hoi. hieu va cac xuc va ((hanh dai) or (lanh dao)) cuu tre*.