Perhaps you should try some spelling variations:
nella letteratura » della letteratura, e letteratura
della literatura » della letteratura, pela literatura, la literatura
social studien » social studies, sociale studies, sociali studies
texas » texts

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: "texas social studien _ filosofia ((della literatura) OR (nella letteratura))".
• Adding a wildcard symbol may retrieve word variants: texas social studien _ filosofia ((della literatura) OR (nella letteratura))*.