How to better search with MATCH function in user form?

[GIS2013]

Hi. I'm using MATCH in my userform (phonebook): it goes like that: if you type person's full name (accurately!) then you get his/her full details, like his/her phone, email, etc. But what if users don't know the full name of the person they are looking for, say they only know last name, how do I use MATCH then? I guess there is a way to "soften" the search criteria?