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
hai xuc » hai cuc, hai xu, chat xuc
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
cua tre » cuu tre, cua triet, dua tren
xuc va » duc va, tuc va, luc va
cua te » cua tu

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 hanh di ((cua tre) OR (cua te))~.
• 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 hanh di ((cua tre) OR (cua te))~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (tu sach)) ky nang x ho. hieu qua hai xuc va hanh di ((cua tre) OR (cua te))*.