I'm not sure if that's possible, but you could always filter the results on the page references you have, so that the only pages returned are the ones in your collection.

Thanks for the reply. Yeah that's the way I decided to do it, though it's more inefficient (searching all pages to match a query and then filtering it on categories/tags instead of doing it the other way around).

What about adding a property to the pages that you want to search, called for example "SearchThisPage" and then using with the two criterion of the user's search text and the property "SearchThisPage" is true with:

DataFactory.Instance.FindPagesWithCriteria

The problem is it's a very large solution with thousands of pages and I heard FindPagesByCriteria is kind of slow in these situations , so I'm using this: http://labs.episerver.com/en/Blogs/Allan/Dates/112230/4/Quick-Category-Search/ to quickly find my categorized pages. These in turn are the pages I'd like to search with a text query.