Perhaps you should try some spelling variations:
"elite groups" » "line groups", "finite groups", "little groups"
"life groups" » "life group", "line groups", "five groups"
"like groups" » "linkage groups", "little groups", "large groups"
"lie groups" » "live groups", "line 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 ("elite groups"))) OR ((("like groups") OR ("lie groups")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"life groups\") OR (\"elite groups\"))) or (((\"like groups\") or (\"lie groups\"))))".
• Removing quotes may allow a broader search: (((( life groups ) OR ( elite groups ))) or ((( like groups ) or ( lie groups )))).
• Adding a wildcard symbol may retrieve word variants: (((("life groups") OR ("elite groups"))) or ((("like groups") or ("lie groups"))))*.