Perhaps you should try some spelling variations:
classical sources » classical studies, classical spaces
classical schemes » classical themes, classical sciences, classic scheme
classical scheme » classic scheme, classical theme, classical science
"classical tape library" » "classical type library", "classical types library", "classical shape library"

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