Functionality similar to this can be seen all over the place:
‘setcore’ reveals no results but search suggestions reveals it. However, if I could only remember ‘guienabled’ and wanted to know what it was, the auto-suggest wouldn’t work here. The wiki’s had some great updates, but the search is still lacking.
You can specifically set partial matches with the asterisk, but I believe that partial matches should be implied. In addition, I think that the API box under Advanced should be default off, as it only creates search results spam.
If I type an exact match in, I think it would be good to send me directly to the page for it unless I insert a character into the search showing I don’t want that exact phrase, such as an asterisk.
I have searched explicitly for superclass, but this is just a demo of result spam. Superclass pages are extremely small and I don’t think that anybody will get legitimate help from these pages, so they should be removed from search results unless you check a box under Advanced.
Why display a redirect first? Redirects should also be replaced with their destination (any objections?), and then only appear once. In here, there are many results that take you to the same page, and it makes searching unintuitive.
I can’t think of any more right now, but anybody is free to attach more screenshots.