Perhaps you should try some spelling variations:
"continuous hypothesis" » "continuum hypothesis", "continuity hypothesis", "continuum hypotheses"
"continuous synthesis" » "continuum synthesis", "discontinuous synthesis", "continents synthesis"
"continues hypothesis" » "continuum hypothesis", "continuity hypothesis", "continuum hypotheses"
"contact hypothesis" » "continuity hypothesis", "continuum hypothesis"

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: (((("continuous hypothesis") OR ("continuous synthesis"))) OR ((("continues hypothesis") OR ("contact hypothesis")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"continuous hypothesis\") OR (\"continuous synthesis\"))) or (((\"continues hypothesis\") or (\"contact hypothesis\"))))".
• Removing quotes may allow a broader search: (((( continuous hypothesis ) OR ( continuous synthesis ))) or ((( continues hypothesis ) or ( contact hypothesis )))).
• Adding a wildcard symbol may retrieve word variants: (((("continuous hypothesis") OR ("continuous synthesis"))) or ((("continues hypothesis") or ("contact hypothesis"))))*.