Google lies about search terms

I was trying out searching for Rosie's Science Club

If I google for wonder why science , Rosie comes out number 2, but the text at the top says
"why" is a very common word and was not included in your search.
If I google for wonder science , I get a completely different result set and Rosie is nowhere to be seen.

I think this is another example of Google weighting <title> tags above PageRank, but the disclaimers haven't caught up.