Search for words in email body

Hi

I am carrying out a content search on all our organisational emails but I just want to search for text or references in the body of the email, nowhere else. Content search use to have body as one of the options but doesn't seem to now? 

I then tried the following in the keywords search

Body:"Fred Bloggs" (c:s) Body:"Freddy Bloggs"

but still came came back with the user's email address references which I don't want. Is there anyway just to search the body field. I am sure there must be and I am missing something quite simple here.

Thanks

Alistair