You can also type your Google search with a "_" (no quote marks) at the end, or somewhere between any of the words, to generate some long tails
If there are none at first you can always try going through the alphabet A>Z
You can try this KWFinder its perfect for beginner but valuable to more advanced for blogger. since KWFinder is paid tool,
and subscribers also benefits to feature such as a SERP analysis, tracks, filtering a results.
You should try a trial of ahrefs, Semrush and KWFinder for long tail keywords. Google suggestions and your competitor's site analysis are good sources of long tail keywords, You can even hire service providers "on BHW".