Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
mang xa » lang xa, mang may, dang xay
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
hanh di » hanh vi, hanh de, hang di
cua tre » cua te, cuu tre, cua triet
xuc va » tuc va, luc va, xac va
di cua » dai cua, doi cua, de 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: tu sach y ((mang xa) OR (nang ma)) hoi. hieu va cac ((xuc va) OR (duc va)) hanh di cua tre~.
• Adding a wildcard symbol may retrieve word variants: tu sach y ((mang xa) or (nang ma)) hoi. hieu va cac ((xuc va) or (duc va)) hanh di cua tre*.