Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
hieu cua » hieu qua, dieu cua, bieu cua
dia danh » dia ban, gia dinh
dai hoi » dai hoc, dai hai, dai moi
cac xuc » cam xuc, cac nuoc, chat xuc
cua tre » cua te, cuu tre, cua triet
tu van » tu va
ma hoi » mai hoi, xa hoi, ma hoa
ca cua » co cua

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

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