Perhaps you should try some spelling variations:
"little groups" » "little group", "simple groups", "pile groups"
"five groups" » "lie groups", "free groups", "wave 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: (((("five groups") OR ("life groups"))) OR ((("like groups") OR ("little groups"))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"five groups\") or (\"life groups\"))) or (((\"like groups\") OR (\"little groups\"))))*".
• Removing quotes may allow a broader search: (((( five groups ) or ( life groups ))) or ((( like groups ) OR ( little groups ))))*.