Use quotation marks to search for exact phrases (“climate change”) when using the default keyword search.
There are no words that are excluded from searching. Every word will be searched. For example, if the words "a, an, the" are in your search, the catalog will look for those specific words.
You can use AND or OR (in all-caps) to ensure that both terms must be in the results, or that one or the other term may be in the results.
If you know what title or author you are looking for, or have other specialized limiters like date or language, you can use the advanced search option to the right of the search box.