Perhaps you should try some spelling variations:
general operative » general operation, general operating, general preoperative
general relation » general relations, general regulations, general revolution
"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 operative) or (general relation))ly) or (((general operative) or (general relation))))")).
• Removing quotes may allow a broader search: (( general relativity ) or ( ((((general operative) or (general relation))ly) or (((general operative) or (general relation)))) )).
• Adding a wildcard symbol may retrieve word variants: (("general relativity") or ("((((general operative) or (general relation))ly) or (((general operative) or (general relation))))"))*.