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