How to search XML feed and give a count

Hi all,

I would like to learn how to make a keyword search on an XML file.

For example :

Here is an example XML code

<kurulus>ISTANBUL U. ORMAN F.</kurulus>

Once a client types a keyword like “ISTANBUL”, I want the code scan the XML file’s <kurulus> section and give me the number of results (not the actual results). Is there a way to do that?