Perhaps you should try some spelling variations:
"continued theory" » "continuous theory", "continued thereby", "continuity theory"
"continue theory" » "continuous theory", "continuity theory", "continues theorie"
"continuum theory" » "continuous theory", "continues theory"

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: (("continuum theory") OR ((("continue theory") OR ("continued theory")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"continuum theory\") or (((\"continue theory\") OR (\"continued theory\"))))".
• Removing quotes may allow a broader search: (( continuum theory ) or ((( continue theory ) OR ( continued theory )))).
• Adding a wildcard symbol may retrieve word variants: (("continuum theory") or ((("continue theory") OR ("continued theory"))))*.