Perhaps you should try some spelling variations:
stents safety » agents safety, events safety, tenth safety
die filosofia » de filosofia, e filosofia, da filosofia
la literatura » la litterature, a literature
safety study » safety studies, safety stock
di filosofia » la filosofia, e filosofia

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: stents safety study ((die filosofia) OR (di filosofia)) la literatura.
• Adding a wildcard symbol may retrieve word variants: stents safety study ((die filosofia) or (di filosofia)) la literatura*.