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, tu cach
xuc ban » duc ban, cuc ban, quoc ban
xuc van » duc van, luc van, vuc van
hieu va » lieu va, hieu qua
te sach » toc sach
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao
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) OR (te sach)) ky nang o hai. hieu va cam ((xuc van) or (xuc ban)) hanh thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky nang o hai. hieu va cam ((xuc van) OR (xuc ban)) hanh thai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) ky nang o hai. hieu va cam ((xuc van) or (xuc ban)) hanh thai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (te sach)) ky nang o hai. hieu va cam ((xuc van) or (xuc ban)) hanh thai cua tre*.