Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
benh day » benh dai, benh cay, benh da
ban benh » san benh, ba benh, ban banh
hieu van » hieu va, thien van, lieu va
day cua » dai cua
xuc ban » duc ban, cuc ban, quoc ban
van cam » van nam, van lam, van cau
cua tre » cua te, cuu tre, cua triet
nang xa » lang xa, nang ma, mang xa
su sach » so sach, vu sach

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) OR (su sach)) ky ((nang xa) OR (nang x)) hoi. hieu van cam xuc ban benh day cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (su sach)) ky ((nang xa) OR (nang x)) hoi. hieu van cam xuc ban benh day cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (su sach)) ky ((nang xa) OR (nang x)) hoi. hieu van cam xuc ban benh day cua tre*.