A "search bubble" is a fact of googling the same problem matter repeatedly and google pre-empting your desired results. When searching for a subject, perhaps panda (mammal) and following links to zoos, further searches for panda (car) bucket seat, may present you with pandas sitting on food buckets.
Many people have suffered search bubble symptoms when browsing political news and find they only get search results for the parties that they follow regularly.
Bob: Have you finished diagnosing the problem with report program
Alex: Sorry Bob, I've been stuck in a search bubble all day