Perhaps you should try some spelling variations:
fuel literature » abel literature, level literature, model literature
filosofia fuel » filosofia del, filosofia de, filosofia e
scale studium » schule studium, scale studies, duale studium
ii filosofia » di filosofia, la filosofia, e filosofia
tests scale » tests stable, sets scale, tests safe
studium ii » studium im, studium i, studium die

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• Adding a wildcard symbol may retrieve word variants: tests scale studium ii filosofia fuel literature*.