Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
hieu ve » hieu va, hieu van
cac xuc » cam xuc, cac nuoc, chat xuc
va danh » va dinh, va dan, va hanh
vai cua » dai cua, hai cua, bai cua
lai cua » dai cua, hai cua, lai chau
y sang » duy sang
_ sang » _ san
ve cac » va cac, vien cac
xuc va » duc va, tuc va, luc va

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: toc sach ((y sang) OR (_ sang)) xa hoi. hieu ve cac xuc va danh ((vai cua) OR (lai cua)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((y sang) OR (_ sang)) xa hoi. hieu ve cac xuc va danh ((vai cua) or (lai cua)) tre~".
• Adding a wildcard symbol may retrieve word variants: toc sach ((y sang) OR (_ sang)) xa hoi. hieu ve cac xuc va danh ((vai cua) or (lai cua)) tre*.