Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
hieu van » hieu va, thien van, lieu va
tinh lai » tinh lao, tinh hai, minh lai
chau tre » chay tren, chau tho, cho tre
ty nong » tu nong, may nong, duy nong
ty dong » tay dong, tu dong, ly dong
van cam » van nam, van lam, van cau
cam tuc » cam xuc, cam tu, nam thuc
va tinh » may tinh
tuc va » thuc va, truc va, tuc xa

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 ((ty nong) OR (ty dong)) xa hoi. hieu van cam tuc va tinh lai chau tre~.
• Adding a wildcard symbol may retrieve word variants: toc sach ((ty nong) or (ty dong)) xa hoi. hieu van cam tuc va tinh lai chau tre*.