Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
dang xay » dang van, van xay
su sach » so sach, vu sach
vai cua » dai cua, hai cua, lai cua
sach ty » sach y, sach tu, sach thu
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
ang xa » lang xa, mang xa, hoang xa
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 ((ang xa) OR (dang xay)) hoi. hieu ve cac ((xuc va) OR (tuc va)) hanh vai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty ((ang xa) OR (dang xay)) hoi. hieu ve cac ((xuc va) or (tuc va)) hanh vai cua tre~".
• Adding a wildcard symbol may retrieve word variants: su sach ty ((ang xa) OR (dang xay)) hoi. hieu ve cac ((xuc va) or (tuc va)) hanh vai cua tre*.