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By Athena Jones

(CNN) - Type the words "completely wrong" into a Google search, and see what pops up for images: a slew of photos of Republican presidential candidate Mitt Romney.

Google says it's not intentional, and is simply the result of normal search algorithms.

CNN's Athena Jones spoke with an expert about what's behind it, and past examples affecting presidents and presidential candidates.

Google, Yahoo, Bing. Search engines are a part of modern life.

The top rising searches during the vice presidential debate were "Biden," "conflating," "malarkey," and "who is winning the debate?"

It's a window into the minds of millions of web users.

But search engines can also raise eyebrows. For instance, when you type "completely wrong" into a Google image search, you get a whole lot of pictures of Mitt Romney.

Google says the gallery of photos was unintentional. Its algorithms simply picked up on news coverage of Romney's own description of his "47 percent" remarks.

We saw a similar trend on Bing and Yahoo, but to a lesser degree.

"For a search engine, they really rely on the words that are around an image to understand what it's about. If you put a picture of Mitt Romney beside words that say 'completely wrong' then they say, I guess this is relevant for 'completely wrong,'" said Danny Sullivan, contributor to SearchEngineLand.com.

Still, sometimes it's intentional using "Google bombs."

In the mid-2000s, pranksters created links that caused a Google search for the words "miserable failure" to put President George W. Bush at the top of the results page.

Google later tweaked its analytics to limit the practice.

Intentional or not, a search for the phrase "debate fail" brings up images of President Obama, but also of people like Romney, Governor Rick Perry, and one-time presidential hopeful John Kerry.

Speaking of Kerry, who was accused of flip-flopping on issues, conservative bloggers managed to push his campaign website to the top of Google searches for the word "waffles."

[Reporter]: "Is this just a modern reality and candidates are powerless to stop it?"

"One of the best things they can do to protect themselves is to make sure they have multiple websites that are about themselves officially," said Sullivan.

The good news: search results usually fade over time.

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