I've just completed a rewrite of the site search. The results are no longer sorted by date and are weighted by the title, likes and age. The title bears a stronger weight than the description or code. Posts will rank higher if they have more likes and are newer. By default threads are excluded from the initial search. Only when there are no snippets or projects will the threads show up.
On a related note, I've noticed a few times on my Nexus 7 tablet, that the navigation bar, specifically the "Explore" button is not so friendly. The resolution isn't small enough to get a drop down of the entire bar, and since I cannot hover on a touchscreen device, it only allows clicking. Just a heads up.
I've also removed threads from the Explore page. You'll have to click "Threads" to show the most recent threads.