You can filter search results after a search using the column filters, e.g. searching for .txt files then filtering for just 'readme'
File name: *.txt
Look In: C:\Program Files\Mythicsoft
The column filters are activated by pressing the filter button in the top right of the File List View. Results are filtered as you type.
The Summary tab shows the 'Displayed' count to differentiate from the 'Found' count.
A full screenshot looks like this: