Perhaps you should try some spelling variations:
e literature » e literatur, life literature, prose literature
filosofia e » filosofia de, filosofia del
tests safe » tests safety, tests scale, tests space
studium im » studium die, studium _, studium 3
studium 1 » studium _, studium 3, studium 8

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: "tests safe ((studium im) OR (studium 1)) filosofia e literature".
• Adding a wildcard symbol may retrieve word variants: tests safe ((studium im) OR (studium 1)) filosofia e literature*.