Perhaps you should try some spelling variations:
stents safety » agents safety, events safety, patients safety
tests safety » test safety, guests safety, lists safety
tenth safety » heath safety, kent safety, ninth safety
e filosofia » la filosofia
filosofia e » filosofia de, filosofia del
literatur » literature

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: ((tests safety) OR (((stents safety) OR (tenth safety)))) study e filosofia e literatur.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tests safety) or (((stents safety) OR (tenth safety)))) study e filosofia e literatur".
• Adding a wildcard symbol may retrieve word variants: ((tests safety) or (((stents safety) OR (tenth safety)))) study e filosofia e literatur*.