Perhaps you should try some spelling variations:
nhanh tri » nhanh thi, thanh tri, nhanh thai
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hieu va » lieu va, hieu qua
luc van » luoc van, luu van, duc van
cua tre » cua te, cuu tre, cua triet
o hoa » do hoa, so hoa, o ha
o hai » co hai, so hai, o lai

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 ty nang ((o hoa) OR (o hai)). hieu va cac ((luc van) OR (duc tan)) nhanh tri cua tre~.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang ((o hoa) or (o hai)). hieu va cac ((luc van) or (duc tan)) nhanh tri cua tre*.