>Why does this return all kinds of results that are NOT the exact phrase? What's the point? I'm looking for the exact phrase, if it doesn't exist, it should not return any results.
>

>"Invalid response was returned by the payer."
>

For me (google.ca) that phrase returned no results.

It also offered a "did you mean" of "Invalid response was returned by the player."

It also showed results for your phrase, without the quotes.

If you preface the quoted string with a "+" that should force it to show only results that include that exact string i.e.

+"Invalid response was returned by the payer."

In practice this may not give you results that are any different from what you see without the "+" but it's very useful when combining terms. You can also use "-" to force exclusion of results that include a certain word or phrase.