Multiple display styles for using 'All Words'

I’ve just found out that it’s possible to search for multiple words at once, which is very useful when I’m trying to rotate multiple common descriptions for the same item and not use the same one too often or too close together.

ie. He picked up the holdall/the bag was very heavy etc

Showing the multiple words is great, but they all show in the one highlight colour. It would be great to be able to define multiple colours so that each word displays differently on the page. Would really help to give an overview of the usage of multiple words.