Perhaps you should try some spelling variations:
hieu quan » lieu quan, thien quan, lien quan
hinh thai » sinh thai, tinh thai, dinh thi
thai cua » than cua, tai cuc, tri cua
van hinh » van chinh, van thinh, van minh
xuc van » duc van, luc van, vuc van
cac xuc » cam xuc, cac nuoc, chat xuc
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
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: tu sach ky nang o hai. ((hieu ve) or (((hieu quan) or (hieu qua)))) cac xuc van hinh thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang o hai. ((hieu ve) OR (((hieu quan) OR (hieu qua)))) cac xuc van hinh thai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang o hai. ((hieu ve) or (((hieu quan) or (hieu qua)))) cac xuc van hinh thai cua tre*.