Right before RankBrain, Google didn’t realize synonyms and would return literal interpretations of a term. From Google: “…just before we experienced Superior AI, our methods only looked for matching terms. One example is, in case you searched for “pziza” – unless there was a page with that specific misspelling, https://myleshdxsl.blogminds.com/the-ultimate-guide-to-google-pagerank-24606762