I couldn't find that anywhere.
I just happened to remember the thread you talked about.
How?
Next time when you plan to use search box, try this: Make sure you add a quote on a keyword. Then add the next keyword after the quote. Do not use common word in search box like "and."
For example, type like this in the search box: "guns" ministers.
They will list the posts with title name that matches with your keyword first. Then the rest with keywords found in the body of the posts.
Cheers.