Perhaps you should try some spelling variations:
die studenten » der studenten, den studenten, fur studenten
3 filosofica » e filosofica, e filosofia, a filosofia
filosofica e » filosofia e, filosofica da, filosofia de
e literatura » de literatura, y literatura, e literatur
studenten 3 » studenten _, studenten 5, studenten 4
test die » test de, west die, test drive