Perhaps you should try some spelling variations:
hanh lai » hanh lam, hanh tai, thanh lap
su sach » so sach, vu sach
lai cua » dai cua, hai cua, lai chau
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
ve cac » va cac, vien cac
y sang » _ sang, duy sang
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc va
me hoi » le hoi

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