Perhaps you should try some spelling variations:
la literatura » la litterature, a literature
based studien » based studies, basedow studien, based student
dd filosofia » di filosofia, da filosofia, la filosofia
de filosofia » e filosofia, di filosofia, la filosofia
sets based » arts based, agents based

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: "sets based studien ((dd filosofia) OR (de filosofia)) la literatura".
• Adding a wildcard symbol may retrieve word variants: sets based studien ((dd filosofia) OR (de filosofia)) la literatura*.