I think a search result that didn't find anything should also search for all related words in the query. I'm not sure I can explain this enhancement request any better without providing an example:
If I search for "Nelson's disease" I get no results, but the possible results that do show up only appear for "Nelson". I would like it if the search would include words related "disease" since that word can be easily switched for "syndrome".
If I had started my search for "Nelson's syndrome", it would have brought up the correct page.
I don't know how to modify or update the mechanism that is in place that redirects pages, but that might work as well.