Perhaps you should try some spelling variations:
cham cua » chat cua, cham cuu, ham cua
tu sach » thu sach, su sach, te sach
va cham » va chat, va tham
dinh vi » dinh ve, dinh viet, dinh tri
danh vi » hanh vi, danh di, danh va
hieu va » lieu va, hieu qua
xay hoi » xa hoi, tay hoi, cay phoi
ty dang » ky dang, ty hang, ty dong
cua tre » cua te, cuu tre, cua triet

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((ty dang) or (ty xang)) xay hoi. hieu va cham cua ban ((danh vi) or (dinh vi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty dang) OR (ty xang)) xay hoi. hieu va cham cua ban ((danh vi) OR (dinh vi)) cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty dang) or (ty xang)) xay hoi. hieu va cham cua ban ((danh vi) or (dinh vi)) cua tre*.