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

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