Perhaps you should try some spelling variations:
hinh thai » sinh thai, tinh thai, dinh thi
hieu van » thien van, lieu va
van hinh » van chinh, van thinh, van minh
thai cua » than cua, tai cuc, tri cua
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
cac xuc » cam xuc, cac nuoc, chat xuc
xuc van » duc van, luc van, xuc ban
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 van) OR (hieu va)))) 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 van) OR (hieu va)))) cac xuc van hinh thai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang o hai. ((hieu ve) or (((hieu van) OR (hieu va)))) 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 van) OR (hieu va)))) cac xuc van hinh thai cua tre*.