Perhaps you should try some spelling variations:
nuoc sach » nguoi sach, hoc sach, cuoc cach
doc sach » hoc sach, toc sach, dac sac
lang de » vang de, dang de, lang du
va lang » va nang, hoa lang
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, nang ma
va dao » ca dao
v nang » va nang, vu nang, van nang
luc va » duc va, tuc va, loc va
de cua » le cua, te cua, dieu cua
va cao » va cac, va co, va bao

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: ((nuoc sach) OR (doc sach)) v nang xa hoi. hieu ((va cao) OR (va dao)) luc va lang de cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((nuoc sach) or (doc sach)) v nang xa hoi. hieu ((va cao) OR (va dao)) luc va lang de cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((nuoc sach) or (doc sach)) v nang xa hoi. hieu ((va cao) OR (va dao)) luc va lang de cua tre*.