Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
thanh de » hanh de, thanh ve, thanh do
thanh di » thanh doi, thanh do, thanh dinh
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cam tuc » cam xuc, cam tu, nam thuc
tuc gia » tac gia, duc gia, toc gia
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
va cam » va cham, va cac, va cao
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach v nang xa hoi. hieu va cam tuc gia ((thanh di) or (thanh de)) ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach v nang xa hoi. hieu va cam tuc gia ((thanh di) OR (thanh de)) ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: toc sach v nang xa hoi. hieu va cam tuc gia ((thanh di) or (thanh de)) ((cua tre) or (cuu tre))*.