Find a specific word within a specific folder on a cloud drive? I send out monthly wine cases to my clients, and we never send the same wine twice (until the vintage changes).

I need to be able to search through all the existing tasting sheet docs to make sure that I haven't sent, for example, Chateau Haut Brion (if only!) previously. 

In pc, I could just go straight to the folder, in this case Wine Club Tasting Sheets, and search that folder and instantly I would find that I did send the specific wine in August 2019 (as an example). I cannot for the life of me see how I do this within Finder/Spotlight or 3rd party app Easy Find.
In the Finder Preferences you can chose to search on your Mac or within the current folder (Finder Preferences > Advanced > When Performing a Search: drop down)
Spotlight searches filenames and file contents.