Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
banh dai » benh dai, ban dai, vanh dai
ban banh » ban hanh, ban anh, ban danh
hieu van » hieu va, thien van, lieu va
cuc ban » cua ban, cac ban, cuu ban
lam cuc » lam cua, lam duoc, pham cuc
van lam » van nam
nang xa » nang x, lang xa, nang ma
tu sach » su sach, te sach, tu cach
cua tre » cua te, cuu tre, cua triet

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 (tu sach)) ty ((nang xa) OR (nang cao)) hoi. hieu van lam cuc ban banh dai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) OR (tu sach)) ty ((nang xa) or (nang cao)) hoi. hieu van lam cuc ban banh dai cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) OR (tu sach)) ty ((nang xa) or (nang cao)) hoi. hieu van lam cuc ban banh dai cua tre*.