Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
thai cua » than cua, tai cuc, tri cua
vu sach » vu bach, vu khach
xuc ban » duc ban, cuc ban, quoc ban
xuc van » duc van, luc van, vuc van
va cham » va chat, va tham
hieu va » lieu va, hieu qua
su sach » so sach
cua tre » cua te, cuu tre, cua triet
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: ((vu sach) OR (su sach)) ky nang o hai. hieu va cham ((xuc van) or (xuc ban)) hanh thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (su sach)) ky nang o hai. hieu va cham ((xuc van) OR (xuc ban)) hanh thai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) OR (su sach)) ky nang o hai. hieu va cham ((xuc van) or (xuc ban)) hanh thai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) OR (su sach)) ky nang o hai. hieu va cham ((xuc van) or (xuc ban)) hanh thai cua tre*.