Perhaps you should try some spelling variations:
"general revolution" » "general solution", "general solutions", "generalized solution"
"general operative" » "general operation", "general operating", "general preoperative"
"general relative" » "general relation", "general relating", "general relations"
"general relativity" » "general relatively"

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: (("general relativity") OR ((((("general relative") OR ("general operative"))) OR ("general revolution")))).
• Removing quotes may allow a broader search: (( general relativity ) or ((((( general relative ) or ( general operative ))) or ( general revolution )))).
• Adding a wildcard symbol may retrieve word variants: (("general relativity") or ((((("general relative") or ("general operative"))) or ("general revolution"))))*.