Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
thuc ban » thuoc ban, thuc dan, thu ban
ban hanh » ban hang
hanh hoi » hanh thoi, hanh noi, hanh hoa
so sach » so sanh, bo sach, co sach
mang xa » lang xa, mang may, dang xay
hieu le » hieu ve, hieu he, hieu ly
hoi cua » hoi chuc
cua tre » cua te, cuu tre, cua triet
sach v » sach va, sach y, sach 2
le nam » ly nam, he nam, le na

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach v ((mang xa) or (nang x)) hoi. hieu le nam thuc ban hanh hoi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach v ((mang xa) OR (nang x)) hoi. hieu le nam thuc ban hanh hoi cua tre.
• Adding a wildcard symbol may retrieve word variants: so sach v ((mang xa) or (nang x)) hoi. hieu le nam thuc ban hanh hoi cua tre*.