Perhaps you should try some spelling variations:
dang xay » dang van, van xay
qua cham » qua hai, qua cac, va cham
hanh lai » hanh lam, hanh tai, thanh lap
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
lai cua » dai cua, hai cua, lai chau
cua tre » cua te, cuu tre, cua triet
xuc va » tuc va, luc va, xac 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: so sach ty ((nang x) OR (dang xay)) hoi. hieu qua cham ((xuc va) OR (duc va)) hanh lai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ty ((nang x) or (dang xay)) hoi. hieu qua cham ((xuc va) OR (duc va)) hanh lai cua tre~".
• Adding a wildcard symbol may retrieve word variants: so sach ty ((nang x) or (dang xay)) hoi. hieu qua cham ((xuc va) OR (duc va)) hanh lai cua tre*.