Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
ly hang » ly quang
hieu ve » hieu va, hieu van
ve chat » va chat, van chat
xuc van » luc van, vuc van, xuc ban
duc van » duc va, duc tan, duc manh
cua tre » cua te, cuu tre, cua triet
y hang » ty hang, yu hang, _ hang
vi cua » vai cua, di 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: toc sach ((y hang) OR (ly hang)) xa hoi. hieu ve chat ((xuc van) OR (duc van)) hanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((y hang) OR (ly hang)) xa hoi. hieu ve chat ((xuc van) or (duc van)) hanh vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: toc sach ((y hang) OR (ly hang)) xa hoi. hieu ve chat ((xuc van) or (duc van)) hanh vi cua tre*.