Perhaps you should try some spelling variations:
"runge theorie" » "range theories"
"d'une theorie" » "eine theorie", "d'un theoreme", "seine theorie"
"runge theory" » "range theory", "nudge theory", "change theory"
"regge theory" » "range theory", "gauge theory", "hodge 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: (((("runge theorie") OR ("d'une theorie"))) OR ((("runge theory") OR ("regge theory")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"runge theorie\") or (\"d'une theorie\"))) or (((\"runge theory\") OR (\"regge theory\"))))".
• Removing quotes may allow a broader search: (((( runge theorie ) or ( d'une theorie ))) or ((( runge theory ) OR ( regge theory )))).
• Adding a wildcard symbol may retrieve word variants: (((("runge theorie") or ("d'une theorie"))) or ((("runge theory") OR ("regge theory"))))*.