Found Parker family in 1930 census!

If you go to ancestry.com's 1930 census search page and do a search for William B Parker and Ada Parker, or any of the other Parker family members, you will not find them. But when i went through the census page by page, like all 40 or so of them, guess what? I found them.

I think for some reason, they didn't get indexed by the site. I mean, an exact search should find them. They're right there! I know they are in the census b/c i saw it with my own eyes. I saved that page. I don't want to lose it again.

But now to the point of this post. I've been having trouble finding other family members in the census. For one, I can't find John Hardy or my grandma in the 1930 census (and she should be living with him since she got married later in the year). Of course, I only searched Coopers so maybe they lived in a different township. I also cannot find Ada and her family in the 1900 census. I searched Coopers last night but turned up no Davis family of mine, so I'll have to search another township.

I'm starting to wonder how many other ancestors I can't find when I do a search are actually there but the person indexing the names forgot them. I was really surprised to see my family there in 1930 and seeing no record of them in the search.