Perhaps you should try some spelling variations:
"little groups" » "little group", "simple groups", "pile groups"
"live groups" » "lie groups", "like groups", "five groups"
"life groups" » "lie groups", "like groups", "life group"

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: (((("live groups") OR ("life groups"))) OR ("little groups"))*.
• Removing quotes may allow a broader search: (((( live groups ) or ( life groups ))) or ( little groups ))*.