Another person has asked abut this, and @I-d-as posted a workaround that I should have thought of:
EDIT: The workaround doesn’t fully work, but I posted a version that does:
As mentioned in that post I also found a way to do what you want in principle, but it freezes Obsidian.
It might be possible to search the context term, copy the results, and run some kind of macro to search the main term using each of the results in a path: selector.
Obviously a built-in syntax would be better, or a way to chain searches (like a pipe in shell scripting).
