Perhaps you should try some spelling variations:
de lite'rature » de litterature, e literature, 2e literature
stents safety » agents safety, events safety, tenth safety
de literatura » de litterature, la literatura, y literatura
studies la » studies lab, studies lca, studies lia

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "stents safety studies la filosofia ((de lite'rature) OR (de literatura))".
• Adding a wildcard symbol may retrieve word variants: stents safety studies la filosofia ((de lite'rature) OR (de literatura))*.