This is strategy is a much more reliable method of searching for Planot Web pages than simply searching using the single word, Planot.
Even with Google though the results my be degradaed by Google algorithms. Do to tools and then the drop cdown menu called "Anytime" and select different "time delimiters" for a search.
I advise you to try using different search engines.
Bing, Yahoo, Duckduckgo, etc.