Perhaps you should try some spelling variations:
economico aziendale » economia aziendale
economic rationale » economics regional, economies national
recherche partie » recherche articles, recherche action, recherche lire
recherche arts » recherche et, recherche les, recherche a
studi » studie, study, saudi

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

• Performing a fuzzy search may retrieve terms with similar spellings: studi di ((recherche arts) OR (recherche partie)) ((economic rationale) or (economico aziendale)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: studi di ((recherche arts) OR (recherche partie)) ((economic rationale) OR (economico aziendale)) ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "studi di ((recherche arts) OR (recherche partie)) ((economic rationale) or (economico aziendale)) ;".
• Adding a wildcard symbol may retrieve word variants: studi di ((recherche arts) OR (recherche partie)) ((economic rationale) or (economico aziendale)) ;*.