Algolia search for "blog directory" doesn't turn up the submission, but it does turn up in comments search, restricted to the past month, for those looking for search-fu tips:
Unfortunately for HN, titles make very poor search targets, all the more so because they're often obscure or obscured.
Comments offer a much larger target. Algolia's other features (searching by site or submitter / comment author), as well as obscure stuff like vote counts (submissions only) can be quite helpful.
I mine my own comments frequently, and that's a key benefit of using HN.