I'm amazed that any of you could possibly prefer the old search over Google, but if you absolutely must use the almost unusable old search function, simply hit browse. This will also allow you to use all the old browse features as well, those were never gone.
Only the search bar at the top of the site will redirect you to Google, so you are actually able to find anything. We could never hope to possibly implement a better search function than Google.
EDIT: This is not to reduce 502s. We are getting a new server for that. I want you all to try a little experiment.
Click on the Browse icon and use the search bar there to search for My Little Dashie. See how long it takes you to find the actual, real story.
Now use the search bar at the top of the site to find the same story. See the difference?