Perhaps you should try some spelling variations:
tinh thai » sinh thai, tinh toan, tinh chat
hieu van » hieu va, thien van, lieu va
thai cua » than cua, tai cuc, tri cua
van tinh » van thinh, van minh, ban tinh
tu sach » thu sach, su sach, te sach
xuc van » duc van, luc van, vuc van
cac xuc » cam xuc, cac nuoc, chat xuc
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va
nang co » nang cao, nang doc, nang noi
nang o » nang ho, nang ro, nang x

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 ky ((nang o) OR (nang co)) hai. ((hieu ve) OR (hieu van)) cac xuc van tinh thai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((nang o) OR (nang co)) hai. ((hieu ve) or (hieu van)) cac xuc van tinh thai cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((nang o) OR (nang co)) hai. ((hieu ve) or (hieu van)) cac xuc van tinh thai cua tre*.