Not sure which end of the search you're referring to, but I think you're after keywords for your blog page, not keywords you search for using Google.
Go to sites that are popular and are about the same subject.
Right click the page (not on a graphic) and choose
View Page Source from the menu. Check out the keyword section at the top of the page for ideas. You won't see it on all pages, but some should show up.
This page has it, but it's hard to find so use the Find function in your browser to find it. I use Firefox and it's ctrl/f to open the search box at the bottom. I keyed in keyw to find it and had to click
next to get past the first occurrence of the word. The second occurrence was the meta name = keywords
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