Personally, I think it has become difficult to find good blogs through Google alone.

My approach is to start from trust platforms such as LinkedIn, and look at people who have relatively senior or credible positions. Then I check whether they have a personal blog.

Good blogs often support RSS. My own blog, makonea, does not support it yet, but in general this is a useful signal.

So when I try to find good blogs on Google, I search for the topic together with keywords like “RSS.”