Hopefully, you are familiar searching for material using Search All on the library page. The importance of choosing keywords will help hone in on a set amount of results. Ideally you'd like to have around 50 items returned. This provides a workable number of sources without being too narrow. Boolean Modifiers [AND, OR, NOT] and Boolean Operators ["quotation marks", (parenthesis), *asterisk], will help get to what you're trying to find. The following videos go into more depth.