Perhaps you should try some spelling variations:
"life groups" » "like groups", "line groups", "elite groups", "lie groups", "little groups"
"life group" » "lie group", "little group"
"line group" » "lie group", "linear group", "online group"
"lie groups" » "like groups", "live groups"

Try widening your search to All Fields.

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 ("life group"))) OR ("line group"))) OR ("lie groups")).
• Removing quotes may allow a broader search: (((((( life groups ) or ( life group ))) or ( line group ))) or ( lie groups )).
• Adding a wildcard symbol may retrieve word variants: (((((("life groups") or ("life group"))) or ("line group"))) or ("lie groups"))*.