Selecting ALL items matching your criteria

If you search for an item, say with a tag, you have the option to add all the items shown on that page to a collection. I think you should be able to select and add ALL the items matching your criteria though, not just the ones shown on the first page. (Like in Gmail, you can select all the email shown on the page, but also choose to select all the emails matching those criteria).

Really frustrating to have to go over that page by page if you have more than 20 items you want to add to a collection for instance.