Perhaps you should try some spelling variations:
"der regional economics conditiond." » "der regional economic conditiond.", "der regional economic condition.", "der regional economics cognition.", "der regionale economics conditiond.", "per regional economics conditiond.", "der region economics conditiond."
"der regionalen economic conditions." » "der regional economic conditions.", "der regionalism economic conditions.", "der regional economy conditions.", "der regionaleen economic conditions.", "per regionalen economic conditions.", "der regionen economic conditions."

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("der regionalen economic conditions.") or ("der regional economics conditiond."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("der regionalen economic conditions.") OR ("der regional economics conditiond.")).
• Removing quotes may allow a broader search: (( der regionalen economic conditions. ) or ( der regional economics conditiond. )).
• Adding a wildcard symbol may retrieve word variants: (("der regionalen economic conditions.") or ("der regional economics conditiond."))*.