Perhaps you should try some spelling variations:
thanh doi » thanh loi, thanh moi, thanh do
toc sach » hoc sach, doc sach, thuoc sach
va thanh » gia thanh, ban thanh, va tinh
hieu va » lieu va, hieu qua
doi cua » dai cua, hoi cua
cam tuc » cam xuc, cam tu, nam thuc
vu nang » vuc nang, va nang, vu dang
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao
tuc va » thuc va, truc va, tuc xa
v nang » va nang, van nang, voi nang
x hoi » xa hoi, o hoi, 5 hoi

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) or (vu nang)) ((x hoi) or (x ho)). hieu va cam tuc va thanh doi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((v nang) OR (vu nang)) ((x hoi) OR (x ho)). hieu va cam tuc va thanh doi cua tre.
• Adding a wildcard symbol may retrieve word variants: toc sach ((v nang) or (vu nang)) ((x hoi) or (x ho)). hieu va cam tuc va thanh doi cua tre*.