You can experiment with and adapt these examples:
Basic Search: espionage france
Basic Search: heresy ("middle ages" OR medieval)
Basic Search: Explorations on Subjectivity, Borders, and Demarcations
Advanced Search Author: jefferson thomas
Advanced Search Title: holocaust memory
Advanced Search Subject: "vietnam war" "protest movements"
Advanced Search Subject: medicine history "20th century"
** Hint ** Try doing a ("search anything") basic search, then look for relevant Subjects (at left hand side of screen of within a book record).