Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
hieu va » lieu va, hieu qua
xuc van » duc van, luc van, vuc van
xuc ban » duc ban, cuc ban, quoc ban
tai cua » thai cua, tai cuc, tri cua
cua tre » cua te, cuu tre, cua triet
tu san » thu san, tu ban, tu can
san ky » sang ky, van ky, dan ky
ma hoi » mai hoi, ma hoa, me hoi

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

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