Perhaps you should try some spelling variations:
"per regional economic conditiond." » "per regional economic condition.", "per regional economic conditons.", "per regional economics cognition.", "per global economic conditiond.", "der regional economic conditiond.", "power regional economic conditiond.", "spur regional economic conditiond."
"der regionale economic conditions." » "der regional economics conditions.", "der regionalism economic conditions.", "der regional economy conditions.", "der regionalen economic conditions.", "die regionale economic conditions.", "durch regionale 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 regionale economic conditions.") or ("per regional economic conditiond."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("der regionale economic conditions.") OR ("per regional economic conditiond.")).
• Removing quotes may allow a broader search: (( der regionale economic conditions. ) or ( per regional economic conditiond. )).
• Adding a wildcard symbol may retrieve word variants: (("der regionale economic conditions.") or ("per regional economic conditiond."))*.