no diff in google searches, despite exclude

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caveat: hopefully i haven't messed up search term syntax  :-)

validator html | css "Rated by" Rating "user reviews" "Very
Good"  | Excellent

validator html | css "Rated by" Rating "user reviews" "Very
Good"  | Excellent -"Good Good

i get same number (528) of results after tried to exclude "Good Good"

example of result synopsis/snippet, still showing excluded phrase:
Download cssed 0.4.0 - cssed is a scriptable and modular GTK2 CSS ...  
    Rating: NOT RATED Rated by: 0 user(s). Rate it, ------------, Excellent, Very
Good, Good, Fair ... HTML Link Validator will check web pages for broken links ...

i don't think this is caused by overly lengthy search phrase because i get same
ignore of same exclude, when comparing shorter search phrase:

and as you'd expect, moving "site:.." to beginning of phrase, getting rid of comma
or, adding closing double quote still gives the same number results:

one thing i noticed is that when the exclude phrase shows in snippet,
Rate it, ------------, Excellent, Very Good, Good,
it's because google found it in form options: -

can find exclude phrase Good Good only in html source (paste of that region):
<option value="5">Excellent</option>

                  <option value="4">Very Good</option>
                  <option value="3">Good</option>
                  <option value="2">Fair</option>
                  <option value="1">Poor</option>

except that there's no comma in the html source!!

anyway, this looks like just an additional weird thing. i don't think it explains why
google gives the same number of results when try excluding "Good Good".

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