Perhaps you should try some spelling variations:
agents safety » patients safety, plants safety, accidents safety
1 filosofica » e filosofica, e filosofia, a filosofia
a literatura » la literatura, a literature, a literatur
y literatura » la literatura
studies 1 » studies 2

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: "agents safety studies 1 filosofica ((a literatura) OR (y literatura))".
• Adding a wildcard symbol may retrieve word variants: agents safety studies 1 filosofica ((a literatura) OR (y literatura))*.