Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
van hanh » van thanh, ban hanh, van anh
hieu ve » hieu va, hieu van
tai cua » thai cua, tai cuc, tri cua
xuc van » duc van, luc van, xuc ban
cac xuc » cam xuc, cac nuoc, chat xuc
tu sach » thu sach, su sach, te sach
cua tre » cua te, cuu tre, cua triet
ve cac » va cac, vien cac
o hai » co hai, so hai, o lai
o hoi » co hoi, o hoc, o hoa

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 (tu cac)) ky nang ((o hoi) or (o hai)). hieu ve cac xuc van hanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (tu cac)) ky nang ((o hoi) OR (o hai)). hieu ve cac xuc van hanh tai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (tu cac)) ky nang ((o hoi) or (o hai)). hieu ve cac xuc van hanh tai cua tre*.