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

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• If you are trying to use Boolean operators, they must be ALL CAPS: (((("specimen philosophiae slavicae") OR ("specimen philosophiae publice"))) OR ((("specimens philosophiae slavicae") OR ("specimina philologica slavicae")))).
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