Imo, you can get 90% of the way to fuzzy keyword action searching by making your keywords natural language and longer/more descriptive, then using cmd+[1-9]/return to select keywords before finishing them.
e.g. Instead of m for menu bar search I use menu, screenshots for screenshot viewer, clipboard images for clipboard images etc. Usually I would only start typing "scr" and it would quickly show me the results. This means I don't have to remember exact abbreviations but can instead just start typing natural language and so long as the keyword has a good, obvious natural way to describe it, it will surface. Obviously a little fuzzing would help but just by renaming the default abbreviation keywords most workflows ship with I find I'm 80% of the way there. For really common or core stuff like say, searching for a file, I still use a single letter or symbol, but only a few of these to remember by heart.