Perhaps you should try some spelling variations:
"general revolution" » "general solution", "general solutions", "generalized solution"
"general relative" » "general relation", "general relations", "general operative"
"general relating" » "general relations", "general reading", "general relation"
"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 relating"))) OR ("general revolution")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"general relativity\") or (((((\"general relative\") OR (\"general relating\"))) or (\"general revolution\"))))".
• Removing quotes may allow a broader search: (( general relativity ) or ((((( general relative ) OR ( general relating ))) or ( general revolution )))).
• Adding a wildcard symbol may retrieve word variants: (("general relativity") or ((((("general relative") OR ("general relating"))) or ("general revolution"))))*.