I disagree with this sentiment.

The accuracy of Google's search results have gotten worse as time goes on. Once upon a time I could search for a specific system error code and get only results that contained that code. Now however, I am lucky if the search term I am looking for is on the same page, even after I add or try all the Search Modifiers.

Yes, the internet has gotten worse. Far more noise then signal. But if I search for: "Error: 98yuasdvfnbi89yt7" I expect to find that within the results. Even if there are 0 results, that is valid feedback too.

If you actually include the quotes in your search term, you'll get the results you want, including zero results if there are no exact matches. Either of the following search terms will work:

"Error: 98yuasdvfnbi89yt7"

Error "98yuasdvfnbi89yt7"

In both cases, that search will currently return one page, this one.

https://www.google.com/search?q=Error+%2298yuasdvfnbi89yt7%2...

https://www.google.com/search?q=%22Error%3A+98yuasdvfnbi89yt...