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, vuc van
cac xuc » cam xuc, cac nuoc, chat xuc
cua tre » cua te, cuu tre, cua triet
ve cac » va cac, vien cac
nang o » nang co, nang ho, nang ro
tu san » thu san, tu ban, tu can
tu sac » tu sach, tu bac, tu lac
o lai » o lao

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((((tu sac) or (tu cac))) or (tu san)) ky nang o lai. hieu ve cac xuc van hanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((tu sac) OR (tu cac))) OR (tu san)) ky nang o lai. hieu ve cac xuc van hanh tai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((((tu sac) or (tu cac))) or (tu san)) ky nang o lai. hieu ve cac xuc van hanh tai cua tre*.