Perhaps you should try some spelling variations:
hinh thai » sinh thai, tinh thai, dinh thi
hieu van » hieu va, thien van, lieu va
thai cua » than cua, tai cuc, tri cua
van hinh » van chinh, van thinh, van minh
tu sach » thu sach, te sach, tu cach
xuc van » duc van, luc van, xuc ban
cac xuc » cam xuc, cac nuoc, chat xuc
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va
su sach » so sach, vu sach
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) OR (su sach)) ky nang o hai. ((hieu ve) or (hieu van)) cac xuc van hinh thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang o hai. ((hieu ve) OR (hieu van)) cac xuc van hinh thai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) ky nang o hai. ((hieu ve) or (hieu van)) cac xuc van hinh thai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) ky nang o hai. ((hieu ve) or (hieu van)) cac xuc van hinh thai cua tre*.