Perhaps you should try some spelling variations:
sach van » sach han, sach va, bach van
van nang » van quang, van ban, van dong
ban hanh » ban hang
thuc ban » thuoc ban, thuc dan, thu ban
so sach » so sanh, bo sach, co sach
le cau » ke cau, le mau, le cap
de cua » le cua, dieu cua
te cua » tue cua, le cua
va cau » van cau, va cac, va dau
x hoi » xa hoi, o hoi, x ho

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: so sach van nang x hoi. hieu ((le cau) OR (va cau)) thuc ban hanh ((de cua) OR (te cua)) tre~.
• Adding a wildcard symbol may retrieve word variants: so sach van nang x hoi. hieu ((le cau) or (va cau)) thuc ban hanh ((de cua) or (te cua)) tre*.