Over the last few months you may have encountered a warning on Google’s Keyword Planner tool.
“Some of your keywords may have been filtered by your settings.”
I adjusted the “Keyword Options” filter on the left until the error resolved.
Show keywords in my account, ON
Show keywords in my plan, ON
Show adult ideas, ON
These keywords aren’t located in my account, they weren’t added to a plan, and they’re not adult related. I’m not sure why these settings matter in this case.
It appears it’s just filtering results with 0 searches. I tested a few other keyword variations that had the same result.