On Special:MediaSearch page search for any Special page - RecentChanges, Watchlist. Searches for Watchlist, or Special:RecentCahnges won't return the result for Special pages.
Special:Search will find Special pages if they are searched with the word Special - Special:RecentChanges.
Special:Search gives the exact link:
- Special pages appear in search results
- Special pages are an option in the namespace filter under "categories and pages"
- When special pages are displayed, the namespace is present and correct