If you search "bone-in pork shoulder" or "bone-in pork" with "" it will look for the exact word match and that should get rid of the "pork shoulders" recipes.
That being said if this way of indexing meat cuts is new you wouldn't necessarily have all of the historical recipes included (Jane can maybe shed some light), but that is still something.
Also that wouldn't work in that case, but note that you can also use + and - like +pork +banana -shallots (to have only recipes with pork and banana but not the ones with banana shallots, for instance)