RegEx - Displaying All Possible String From List In Textbox

I have a list of string. When user inputs chars in, the program would display all possible strings from the list in a textbox.
Dim fruit as new List(Of String) 'contains apple,orange,pear,banana
Dim rx as New Regex(fruit)
For example If user enters a,p,l,e,r , then the program would display apple and pear. It should match any entry for which all letters have been entered, regardless of order and regardless of additional letters.