Perhaps you should try some spelling variations:
toc sach » doc sach, thuoc sach, nuoc sach
thanh di » thanh doi, thanh de, thanh do
hoc sach » hoc sinh, hoc cac, hoc anh
va thanh » gia thanh, ban thanh, va tinh
cam tuc » cam xuc, cam tu, nam thuc
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
vu dang » su dang, vu quang, cua dang
va cam » va cham, va cac, va cao
v nang » va nang, vu nang, van nang
tuc va » thuc va, truc va, tuc xa
di cua » dai cua, doi cua, de cua

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) OR (hoc sach)) ((v nang) OR (vu dang)) xa hoi. hieu va cam tuc va thanh di cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) OR (hoc sach)) ((v nang) or (vu dang)) xa hoi. hieu va cam tuc va thanh di cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) OR (hoc sach)) ((v nang) or (vu dang)) xa hoi. hieu va cam tuc va thanh di cua tre*.