See the search portal's in this demo file. If you are using FileMaker Pro, open the file for the first time from your File menu to get a copy converted to FMP12 format: https://www.dropbox.com/s/0pm1gdqcfi2ndpv/EnhancedValueSelection.fp7
One of these portals uses the PatternCount function to get a "contains" type filter logic to work.
Fantastic! Thanks so much!!