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.
A good way to narrow a wide search is by using the Advanced Search feature in VuFind.
By entering certain search terms as "Keyword" and others as "subject", "title", author", etc, you can limit search results further than just entering all terms as keywords.
For example, you might search "Frank Lloyd Wright" as a subject, and "Marion Mahony Griffin" as a keyword, in order to find items that have Wright as a subject but also deal with Griffin in some way.
Or you might search "architecture China" as a subject with "ancient" as a keyword: