Perhaps you should try some spelling variations:
economic agent » economic agents, economic rent, economic rents
recherche und » recherche en, recherche d'une, recherche prend
und economic » under economic, sound economic, und economies
studie der » studien des, studie uber, studium der
studia ve » studie v, studia 4, studia do
studia a » studia 4, studie a, studie av
studi e » studi per, studie 2, studi di

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((((studi e) or (((studia ve) or (studia a))))) or (studie der)) recherche und economic agent ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((studi e) OR (((studia ve) OR (studia a))))) OR (studie der)) recherche und economic agent ;.
• Adding a wildcard symbol may retrieve word variants: ((((studi e) or (((studia ve) or (studia a))))) or (studie der)) recherche und economic agent ;*.