Say I want to create a niche site to sell toothbrushes. I have a list of low comp keywords I want to target, like: "how to wash my teeth" "how to wash your teeth" "how to brush my teeth" "how to brush teeth" "how to clean my teeth" etc. The problem is that they are so similar, and there are multiple ones that basically have the same meaning. So how do I target all these? I understand I have to put my keyword in the title + url, but if I make a separate article for all of these keywords my site will look spammy, with many articles covering the same topic but with different wording. Or should I use a single article for keywords that are similar and try to rank that for all of them?