Perhaps you should try some spelling variations:
autores britannici » auctores britannici
britannici media » britannici medii, britannici add
british academic » british academy, english academic, written academic
british economic » british economics, british economy, spanish economic
media aevi » medii aevi, medii aevii, media evil

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: autores britannici media aevi (the ((british academic) OR (british economic)))~.
• Adding a wildcard symbol may retrieve word variants: autores britannici media aevi (the ((british academic) or (british economic)))*.