Perhaps you should try some spelling variations:
de litterature » la litterature, et litterature
filosofia de » filosofia del
text duales » text modules
e filosofia » la filosofia
text dates » text datei, text daten, text data
studium e » studium _, studium 1, studium 3

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: "((text duales) OR (text dates)) studium e filosofia de litterature".
• Adding a wildcard symbol may retrieve word variants: ((text duales) OR (text dates)) studium e filosofia de litterature*.