Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
ve cai » va cai, ve cac, ve tai
va cao » va cac, va co, va dao
xuc va » duc va, tuc va, luc va
x hoi » xa hoi, o hoi, x ho

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 ky nang x hoi. hieu ((ve cai) OR (va cao)) xuc va hanh vi ((cua tre) OR (cau tao))~.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x hoi. hieu ((ve cai) or (va cao)) xuc va hanh vi ((cua tre) or (cau tao))*.