Perhaps you should try some spelling variations:
safety studien » safety studies, safety study, safety stories
stents safety » agents safety, events safety, tenth safety
filosofica da » filosofia da, filosofia de, filosofica e
filosofia di » filosofia de, filosofia da, filosofia del
studien 4 » studien _, studien 3, studien 5

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 studien 4 ((filosofica da) OR (filosofia di)) literatura*".