Perhaps you should try some spelling variations:
da litterature » la litterature, de litterature, a litterature
oral studium » oral sodium, frau studium, duale studium
ad filosofia » a filosofia, la filosofia, e filosofia
filosofia da » filosofia de, filosofia del, filosofia e
studium ad » studium am, studium a, studium d
test oral » test oracle, test orn, test oracles