Perhaps you should try some spelling variations:
da litterature » la litterature, de litterature, a litterature
oder studium » dem studium, fur studium, das studium
da filosofia » la filosofia, di filosofia, a filosofia
filosofia da » filosofia de, filosofia del, filosofia e
studium da » studium das, studium a, studium d
text oder » text der, text over, text model