You have to seo your keywords in the article body. HP removed, apparently, the ability to tag hubs with specific keywords. Keywords that are meant to be found by the search engines have to be in the title of the hub and then used throughout the hub (that is what I understand from other people with the same question). As far as the nonsense phrases that others may use, I would ignore them. Keep doing your proper research and I believe it should pay off in the long run. I spend a lot of time researching keywords when I want to work on special projects myself (some of my hubs I intend basically only for other hubbers so I don't pay too much attention to keywords). I'm not familiar with keyrow. For my SEO I sometimes use google's SEO quake (which always shows the keywords I researched and their density when I do a scan of my own sites).
Hope this helped a little. I was not quite sure what kind of question you were asking or answer you were seeking.