Perhaps you should try some spelling variations:
stents safety » agents safety, events safety, tests safety
le literatura » la literatura, de literatura, e literatura
tenth safety » heath safety, kent safety, ninth safety
filosofia le » filosofia de, filosofia e, filosofia del
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) OR (tenth safety)) studies la filosofia le literatura".
• Adding a wildcard symbol may retrieve word variants: ((stents safety) OR (tenth safety)) studies la filosofia le literatura*.