Perhaps you should try some spelling variations:
kelly's criterion » kelly criterion, weyl's criterion, levy's criterion
concerns criteria » cancer criteria, concept criteria, contests criteria
line criteria » life criteria, lime criteria, slice criteria

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: (( kelly's criterion ) OR ((( line criteria ) OR ( concerns criteria )))).
• Adding a wildcard symbol may retrieve word variants: (( kelly's criterion ) or ((( line criteria ) or ( concerns criteria ))))*.