Perhaps you should try some spelling variations:
"specimens philological slavicae" » "specimina philologica slavicae", "specimen histological slavicae", "specimen pathological slavicae", "specimens philologica slavicae", "specimens philologica slavica", "specimens philological polemical"
"specimina philologiae slavicae" » "specimina philologica slavicae", "specimen philosophiae slavicae", "specimina philologica slavica"
"specimina philologie slave" » "specimina philologica slave"
"special histologic slavicae" » "special philologica slavicae", "special neurologic slavicae", "special physiological slavicae"

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• If you are trying to use Boolean operators, they must be ALL CAPS: (((("specimens philological slavicae") OR ("special histologic slavicae"))) OR ((("specimina philologiae slavicae") OR ("specimina philologie slave")))).
• Removing quotes may allow a broader search: (((( specimens philological slavicae ) or ( special histologic slavicae ))) or ((( specimina philologiae slavicae ) or ( specimina philologie slave )))).
• Adding a wildcard symbol may retrieve word variants: (((("specimens philological slavicae") or ("special histologic slavicae"))) or ((("specimina philologiae slavicae") or ("specimina philologie slave"))))*.