Perhaps you should try some spelling variations:
de litterature » la litterature, et litterature
alex studium » als studium, duales studium, dualen studium
a filosofia » la filosofia, di filosofia
e filosofia » la filosofia
texts alex » texts annex, texts al, texts all

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