Perhaps you should try some spelling variations:
classical sources » classical spaces
classical scores » classical schemes, classical schools, classical spaces
"classical core library" » "classical codes library", "classical case library", "classical charge library", "classical code library", "classical core libraries"

Try widening your search to All Fields.

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: (("((classical scores) or (((classical sources) OR (classical studies)))) library") OR ("classical core library")).
• Removing quotes may allow a broader search: (( ((classical scores) or (((classical sources) OR (classical studies)))) library ) or ( classical core library )).
• Adding a wildcard symbol may retrieve word variants: (("((classical scores) or (((classical sources) OR (classical studies)))) library") or ("classical core library"))*.