Perhaps you should try some spelling variations:
"little groups" » "little group", "simple groups", "pile groups"
"life groups" » "lie groups", "life group", "line groups"
"like groups" » "lie groups", "large groups", "crime groups"

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