Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
thanh di » thanh doi, thanh de, thanh do
truc va » thuc va, thuc vat, trung va
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
vu nang » vuc nang, va nang, vu dang
tuc va » thuc va, tuc xa, duc va
v nang » va nang, van nang, voi nang
di cua » dai cua, doi cua, de cua
va cam » va cham, va cac, va cao

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