Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
mang xa » lang xa, mang may, dang xay
xang xa » lang xa, ang xa, dang xay
xuc va » duc va, tuc va, luc va
ve cac » va cac, vien cac

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