For the initial release the search is still fairly basic, but A LOT better than the built in search here.
Right now I just look for IF the individual words match ANY of the words in the post title or body and then rank based on the number of upvotes that the post has.
Future versions may look at using elastic search, etc… But for MVP it just looks for the number of hits + the score of the post as I assume the higher the score the more trustworthy the post, and obviously the more matches that to your query the more relevant the post is.