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