Perhaps you should try some spelling variations:
"weil's criterion" » "kelly's criterion", "white's criterion", "li's criterion"
"levy's criterion" » "kelly's criterion", "lane's criterion", "level criterion"
"wiener criteria" » "wiener criterion", "inter criteria", "cient criteria"
"filter criteria" » "inter criteria", "better criteria", "floor 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 ("levy's criterion"))))) OR ((("wiener criteria") OR ("filter criteria")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"weyl's criterion\") or (((\"weil's criterion\") OR (\"levy's criterion\"))))) or (((\"wiener criteria\") or (\"filter criteria\"))))".
• Removing quotes may allow a broader search: (((( weyl's criterion ) or ((( weil's criterion ) OR ( levy's criterion ))))) or ((( wiener criteria ) or ( filter criteria )))).
• Adding a wildcard symbol may retrieve word variants: (((("weyl's criterion") or ((("weil's criterion") OR ("levy's criterion"))))) or ((("wiener criteria") or ("filter criteria"))))*.