Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
ban benh » san benh, ba benh, ban banh
van lam » van nam
benh di » benh dai, ben di, benh da
cuc ban » cua ban, cac ban, cuu ban
van cam » van nam, van cau, van dam
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
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ((y nang) OR (v nang)) x hoi. hieu ((van cam) or (van lam)) cuc ban benh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((y nang) OR (v nang)) x hoi. hieu ((van cam) OR (van lam)) cuc ban benh di cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((y nang) OR (v nang)) x hoi. hieu ((van cam) or (van lam)) cuc ban benh di cua tre*".