Hey @jeremy2, I received a response from the dev team. They've explained that the fulltext search is not an exact term search. The search engine will stripe out all terms like "the", "a", "it", "she", and keep only what it considers as relevant words.
For the moment there isn’t any sort of workaround for this. The only option to get more specific results would be to use a third-party search service such as Algolia.