I have a custom search for IMDB using "i", so when I need to search for something that starts with "i", I just add a "g" before to manually indicate I want to use Google. For example, "g i want to break free". So in your case, just typing "g b and m" should do the trick.
I think in the past we were able to change these shortcuts or even delete them, but now I see they are static. 😞