Perhaps you should try some spelling variations:
sociale studies » social studies, sociali studies, scale studies
sociale studie » sociali studies, soziale studien, social studies
die filosofia » di filosofia, de filosofia, e filosofia
del literatur » model literatur, teil literatur, igel literatur

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 ((sociale studie) OR (sociale studies)) die filosofia del literatur".
• Adding a wildcard symbol may retrieve word variants: texts ((sociale studie) OR (sociale studies)) die filosofia del literatur*.