please try this search: https://en.wikipedia.org/w/index.php?search=intitle%3A%22education+research%22+OR+intitle%3A%22educational+research%22&title=Special%3ASearch&go=Go
Topic on Talk:Search/Old
I've submitted a bug report here: https://bugzilla.wikimedia.org/show_bug.cgi?id=67735
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