I guess it is a typical student's question:
in my research I discover that the bigger part of it is the serach inside the search options. I work in humanities, and before the research method and scope are defined, it is a hell of options and suggestions for the search modification.
A theoretical: Are there any definitions for this exponentation of information (understandable with no professional mathematician's apparatus)? Popular theories, related surnames?
B practical: any "tricks of the trade" in saving some time from being wasted for the secondary searches?