If you prefer, you can click on the Advanced search link below the Basic Search box to access the Search Builder.
This screen helps you build your search either line by line, or concept by concept. Simply enter your search terms, then click on the Add to Query button to add them to the search using the Boolean operator of your choice.
The field tags that are available will vary depending on the database(s) you are searching. You can find more information on advanced searching fields, Boolean operators, and syntax by clicking Search Help.