If you are searching one of the library's article databases and retrieving no results, the two causes usually are either spelling errors or the search is worded too specifically (i.e. typing a question into an article database as opposed to entering one or two keywords).
If you are using the search box (Discovery Search) on the library's homepage, it is possible that the results will take a long time to load. Our Discovery Search box pulls results from many databases and can take quite a while to bring back search results.