Perhaps you should try some spelling variations:
sach thue » sach thieu, sach tham, cach thuc
sach thu » sach thieu, sach tham, cach thuc
cham cuc » cham cuu, pham cuc, pham chuc
ban dan » ban hang, ban hanh, ban quan
cuc ban » cua ban, cac ban, cuu ban
va cham » va chat, va tham
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
x hoi » xa hoi, o hoi, 5 hoi
dan d » dan da, dan de, dan _
d cua » de cua, do cua, da cua

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: tu ((sach thu) OR (sach thue)) hang ((x hoi) OR (x ho)). hieu va cham cuc ban dan d cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach thu) or (sach thue)) hang ((x hoi) OR (x ho)). hieu va cham cuc ban dan d cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu ((sach thu) or (sach thue)) hang ((x hoi) OR (x ho)). hieu va cham cuc ban dan d cua tre*.