Using this tool you can get some ideas on new long tail keywords: just enter a keyword and this tool will expand the keywords the way Google would show keyword suggestions.
Yoast Google suggest expander
Don’t miss out on search traffic!
Did you know that you can optimize your text for multiple keywords if you use Yoast SEO Premium? If you optimize for only 1 keyword, you might be missing out on search traffic for synonyms or related terms. That would be a shame! Get Yoast SEO Premium now to optimize your text properly.