Search among linked columns

I am not sure how this is not already a feature, but please please please expand the Search Everything function to include linked items so that we can really “search everything.”
We keep a list of items on one board and then continuously link back to that. When we run a search, however, we can only see the original item, not the information that is in the connect-boards column. This is enormously frustrating, and kind of defeats the linked-board feature.