It's been a long time since I tried this kind of search so maybe something has changed, but I thought that if you clicked on a storyline that had a "part" after it, it would display all parts of that story, even if it crossed over into different titles. I just tried clicking on a part of "Kraven's Last Hunt" from Spectacular Spider-Man and it searched and found... only that issue.
If this feature has been eliminated (why?), what is the point of having it clickable at all?