Perhaps you should try some spelling variations:
economics report » economic report, economies report, economy report
recherches dans » recherche dans, recherche des, recherche mais
recherche land » recherche dans, recherche prend, recherche les
recherche und » recherche en, recherche d'une, recherche prend
studi e » studi per, studia ve, studie 2

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 ((((recherche land) OR (recherches dans))) or (recherche und)) economics report ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: studi e ((((recherche land) OR (recherches dans))) OR (recherche und)) economics report ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "studi e ((((recherche land) OR (recherches dans))) or (recherche und)) economics report ;*".