If you're having trouble finding results in the Library Catalog, try changing the field in the search bar.
For example, a keyword search will usually bring up a lot more results than a subject search.
Subject headings are used by library catalogers in order to group together different materials about the same topic within the library's catalog. As a researcher, this is another great tool to help you best navigate the library's catalog and discover more resources. To find these look at the right-hand column after you've performed your initial search. Under "topic" you will find similar topics that will bring you to new searches. Below are a few subject heading examples for you to explore.