Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
thai cua » than cua, tai cuc, tri cua
so sanh » do sanh
hieu va » lieu va, hieu qua
duc van » duc va, duc tan, duc manh
xuc van » luc van, vuc van, xuc ban
cua tre » cua te, cuu tre, cua triet
sanh ly » sinh ly, doanh ly, khanh ly
hieu ve » hieu van
ly nang » ky nang, ly hang, ly vang
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.

• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh ly nang o hai. ((hieu ve) OR (hieu va)) cam ((xuc van) OR (duc van)) hanh thai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sanh ly nang o hai. ((hieu ve) OR (hieu va)) cam ((xuc van) or (duc van)) hanh thai cua tre~".
• Adding a wildcard symbol may retrieve word variants: so sanh ly nang o hai. ((hieu ve) OR (hieu va)) cam ((xuc van) or (duc van)) hanh thai cua tre*.