Perhaps you should try some spelling variations:
economics agency » economic agents, economic agent, economics science
recherche prend » recherche en, recherche und, recherche project
economic agency » economic agents, economic agent, economic science
de recherche » la recherche
studi de » studi di, studi e, studie der

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

• Performing a fuzzy search may retrieve terms with similar spellings: studi de recherche prend ((economics agency) OR (economic agency)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "studi de recherche prend ((economics agency) OR (economic agency)) ;*".