Example: civil war
Results: A title search for "civil war" finds records with the words "civil" and "war" in the title field.
Example: erika gottlieb
Results: An author search for "erika gottlieb" finds records with "erika" and "gottlieb" in the author field.
Example: american literature
Results: A subject search for "american literature" finds records with "american" and "literature" in the subject field.
To combine one or more of these, use the Advanced Search (or Power Search) option.