Custom post type admin search

Is it possible to search in custom post type meta fields? I have posts, with many custom meta fields. WordPress by default search only in title and in content. How can I change it?

If you didn’t understand what I am saying, please take a look at my screenshot.

Take a look at my answer to how to filter post listing (in WP dashboard posts listing) using a custom field (search
functionality) ?

Its just what you are looking for.