Special:Badtitle/NS90:Forum:Tech Wishlist And Bug Reports/Search is barely useable./reply (5)

That's partially a design of MediaWiki's built in search feature, but here's a work around:

Say "Title 1" is a linked title but "Title One" is not and needs to be redirected. Go to the page that needs turned into a redirect and open up a new tab for the "What Links Here" option on the sidebar and see what it links to, then turn it into the appropriate redirect.

FYI, PmWiki is even worse, lacking a built in "What Links Here" option.