Perhaps you should try some spelling variations:
"linker's criteria" » "funder's criteria", "concerns criteria", "line criteria"
"levy's criterion" » "kelly's criterion", "lane's criterion", "level criterion"
"cancer criteria" » "concerns criteria", "inter criteria", "cancer arterial"
"weyl's criterion" » "well's criterion", "weil's criterion"

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: (((("weyl's criterion") OR ("levy's criterion"))) OR ((("linker's criteria") OR ("cancer criteria")))).
• Removing quotes may allow a broader search: (((( weyl's criterion ) or ( levy's criterion ))) or ((( linker's criteria ) or ( cancer criteria )))).
• Adding a wildcard symbol may retrieve word variants: (((("weyl's criterion") or ("levy's criterion"))) or ((("linker's criteria") or ("cancer criteria"))))*.