Perhaps you should try some spelling variations:
su sach » so sach, vu sach
tu sach » thu sach, te sach, tu cach
qua hai » qua hoat
hanh di » hanh vi, hanh de, hang di
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
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: ((su sach) OR (tu sach)) ky nang x ho. hieu qua hai ((xuc va) OR (tuc va)) hanh di cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (tu sach)) ky nang x ho. hieu qua hai ((xuc va) OR (tuc va)) hanh di cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (tu sach)) ky nang x ho. hieu qua hai ((xuc va) OR (tuc va)) hanh di cua tre*.