Perhaps you should try some spelling variations:
sach van » sach han, sach va, bach van
qua nhat » qua hoat, luc nhat, qua hai
nhat luc » nhan luc, nhat nuoc, nhat cua
te sach » toc sach
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, me hoi
luc ca » luc cao, luc cua, luc va
ca dan » cac dan, ca dao
ca cua » co 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: te sach van ban ((ma hoi) OR (ma hoa)). hieu qua nhat luc ca dan ca cua tre~.
• Adding a wildcard symbol may retrieve word variants: te sach van ban ((ma hoi) or (ma hoa)). hieu qua nhat luc ca dan ca cua tre*.