Sometimes people misspell their tags on posts. An example: this old post of mine which I tagged with bobbygentry instead of bobbiegentry. (I’ve since fixed this.) Right now, when you search by tag you get back a list of matching tags and tags that contain your search as a substring. I think it would be helpful if we also returned a list of results that have similar spellings in case the post you’re trying to find has a tag typo.