Boolean searches allow you to combine words and phrases using Boolean operators (AND, OR, and NOT) to limit, widen, or define your search.
Federated searching performs simple searching in multiple databases at one time. For advanced searching, search within each specific database.
This tutorial on advanced searching within individual databases is a great start to understanding advanced search techinques. Many of RCCC's databases are purchased through Proquest. This interface is the most popular interface among the databases owned by RCCC.