I haven’t yet figured out how to get Tumblr to give me a general search box. So far I have only been able to find a tag-only search box. In the meanwhile, this link is to the best explanation of Google search hints I have seen. I am posting it here partly so I can easily find it again myself. The hint for searching within a blog like this is as follows. If you wanted to search for “teleotheism” in my blog, type into Google
If you then decide you want to search for “taxes” or “redistribution” in my blog, you only have to change the word “teleotheism” to “taxes” or “redistribution”.