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