Case is irrelevant in searches. Making them so would add more complication to the search criteria & slow the network down in an unnecessary manner. I'm sure you'll find your search results show exactly the same ... that it doesn't matter!

I should add, I do some in all capitals & some with the leading letter in capitals, etc. So I don't really see where this would show any especial advantage for the xtra work such an xtra search requirement search would result in for the loss of search energy required. If that makes sense! lol