Perhaps you should try some spelling variations:
"continuous hypothesis" » "continuum hypothesis", "continuity hypothesis", "continuous synthesis"
"continuum hypotheses" » "continuum hypothesis", "kontinuum hypothese", "continuity hypothesis"
"continuum synthesis" » "continuous synthesis", "continuum hypothesis", "continents synthesis"

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 ("continuum hypotheses"))) OR ("continuum synthesis")).
• Removing quotes may allow a broader search: (((( continuous hypothesis ) or ( continuum hypotheses ))) or ( continuum synthesis )).
• Adding a wildcard symbol may retrieve word variants: (((("continuous hypothesis") or ("continuum hypotheses"))) or ("continuum synthesis"))*.