Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
san benh » sau benh, tai benh, so benh
ban benh » ba benh, ban banh, can benh
cam duc » cam xuc, cao duc, pham duc
van cam » van nam, van lam, van cau
thi van » thi lan, thi hanh, thi nang
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, may nang
v nang » va nang, vu nang, van nang
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: thu sach ((y nang) OR (v nang)) xa hoi. thi van cam duc ((ban benh) OR (san benh)) di cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((y nang) or (v nang)) xa hoi. thi van cam duc ((ban benh) OR (san benh)) di cua tre~".
• Adding a wildcard symbol may retrieve word variants: thu sach ((y nang) or (v nang)) xa hoi. thi van cam duc ((ban benh) OR (san benh)) di cua tre*.