Perhaps you should try some spelling variations:
economic aziendale » economico aziendale, economia aziendale, economic rationale
den recherche » des recherches, de recherches, et recherche
life economic » life economics, nile economic, rice economic
en recherche » une recherche, la recherche, des recherches
de recherche » la recherche

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

• If you are trying to use Boolean operators, they must be ALL CAPS: studi ((en recherche) OR (((den recherche) OR (de recherche)))) life economic aziendale ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "studi ((en recherche) or (((den recherche) OR (de recherche)))) life economic aziendale ;~".
• Adding a wildcard symbol may retrieve word variants: studi ((en recherche) or (((den recherche) OR (de recherche)))) life economic aziendale ;*.