Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
thai cua » than cua, tai cuc, tri cua
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
cuc ban » cua ban, cac ban, cuu ban
xuc ban » duc ban, quoc ban, xuat ban
cua tre » cua te, cuu tre, cua triet
xuc van » duc van, luc van, vuc van
hieu va » lieu va, hieu qua
va cao » va cac, va co, va dao
nang o » nang co, nang ho, nang ro
o hai » co hai, so hai, o lai

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 ky nang o hai. hieu va cao ((xuc van) or (((xuc ban) or (cuc ban)))) hanh thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang o hai. hieu va cao ((xuc van) OR (((xuc ban) OR (cuc ban)))) hanh thai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang o hai. hieu va cao ((xuc van) or (((xuc ban) or (cuc ban)))) hanh thai cua tre*.