Board Thread:Support Requests - Getting Technical/@comment-11700523-20160503074645/@comment-24473195-20160503103146

You could always beg staff to install the more powerful search extension which has that capability according to the documentation. I wouldn't hold my breath for it though, as that requires backporting and some infrastructure changes. In other words $$$$.

Edit:Apparently, wikia uses a custom search extension. So I guess you can make a feature request for that functionality.