Mac Numbers Multiple Variable Search

I've looked everywhere and can't figure out how to do a search in Mac Numbers for 2 or more words. I make wildlife movies and have Numbers lists of all my footage. I can easily find all of my clips that contain elephants with the basic Find box but I can't figure out how to find a clip of, for example, an elephant eating grass. I'm not very consistent with the way I describe clips so I can't expect to find all of the elephant eating grass clips by typing in 'elephant eating grass.' I would like to be able to search using 2 variables. For example, find all clips that have the word 'elephant' and 'grass' in the description. Any ideas?