Perhaps you should try some spelling variations:
"linker's criteria" » "funder's criteria", "line criteria"
"concerns criteria" » "cancer criteria", "concept criteria", "contests criteria"
"weil's criterion" » "weyl's criterion", "kelly's criterion", "white's criterion"
"pde's criteria" » "ideas criteria", "peers criteria", "models 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: (("weil's criterion") OR ((((("linker's criteria") OR ("pde's criteria"))) OR ("concerns criteria")))).
• Removing quotes may allow a broader search: (( weil's criterion ) or ((((( linker's criteria ) or ( pde's criteria ))) or ( concerns criteria )))).
• Adding a wildcard symbol may retrieve word variants: (("weil's criterion") or ((((("linker's criteria") or ("pde's criteria"))) or ("concerns criteria"))))*.