Perhaps you should try some spelling variations:
"weil's criterion" » "kelly's criterion", "white's criterion", "levy's criterion"
"wiener criteria" » "wiener criterion", "inter criteria", "filter criteria"
"better criteria" » "between criteria", "other criteria", "inter criteria"
"weyl's criterion" » "well'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 ("weil's criterion"))) OR ((("wiener criteria") OR ("better criteria")))).
• Removing quotes may allow a broader search: (((( weyl's criterion ) or ( weil's criterion ))) or ((( wiener criteria ) or ( better criteria )))).
• Adding a wildcard symbol may retrieve word variants: (((("weyl's criterion") or ("weil's criterion"))) or ((("wiener criteria") or ("better criteria"))))*.