No search results when I use finder on my Mac

I keep all my recipes, among other things, in Dropbox and have always been able to search using Finder. Not only would it search file titles, but it searched the entire document, so if I'm looking, say, for a recipe that includes "buttermilk", it would show me everything with buttermilk as an ingredient. Not that I've updated, I get no results searching Dropbox in Finder--I get results in "My Mac", but that includes a whole lot of other extraneous and irrelevant items. Also, when I search through Dropbox.com, which is a huge inconvenience, it only gives me results with "buttermilk" in the title. Am I missing something? Is there a workaround, or is this just a function of the update?