If you are going to use keyword multipliers or concatenation then I would suggest that you go into Google Keyword planner and then use the find search volume op

If you are going to use keyword multipliers or concatenation then I would suggest that you go into Google Keyword planner and then use the find search volume option. Once you've done this use the filters and set it to monthly impressions greater than 10 and this should weed out all of the low search volume keywords that clutter your account.