Perhaps you should try some spelling variations:
"specimens philosophiae slavicae" » "specimen philosophiae slavicae", "species philosophy slavicae", "species philosophers slavicae", "specimens philologiae slavicae", "specimens philosophiae publice", "specimens philosophiae suae"
"species philosophiae slavicae" » "species philologiae slavicae", "species philosophiae publice", "species philosophiae suae", "specimen philosophiae slavicae", "species philosophy slavicae", "species philosophers slavicae"
"speciess philosophiae slavicae" » "speciess philologiae slavicae", "speciess philosophiae publice", "speciess philosophiae suae", "specimen philosophiae slavicae", "species philosophy slavicae", "species philosophers slavicae"
"specimens philologica slavicae" » "specimens philological slavicae", "specimina philologica slavicae", "specimina philologiae slavicae", "specimens philologica slavica", "specimens philologiae slavicae", "specimens philologie slave"

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