If you wish to enhance wordpress search widget or My Properties search, you can use a plugin called SEARCH EVERYTHINg which allows you to enable search in custom taxonomies, custom fields – too.

NOTE: the automatic property Id won’t be included in the options of this plugin, but you can add your own ID and that will work.

More on how to manage your own property id is here

http://help.wpresidence.net/article/how-to-add-custom-property-id-to-search/

Here is a video example