In advance of RankBrain, Google didn’t realize synonyms and would return literal interpretations of the word. From Google: “…just before we experienced Sophisticated AI, our systems only looked for matching text. As an example, should you searched for “pziza” – unless there was a page with that exact misspelling, https://holdengmrux.wikiconversation.com/6436482/facts_about_google_site_speed_revealed