Perhaps you should try some spelling variations:
"specimens philological slavicae" » "specimina philologica slavicae", "specimen histological slavicae", "species physiological slavicae", "specimens philologica slavicae", "specimens philologica slavica", "specimens philological polemical"
"specimen pathological slavicae" » "specific pathological slavicae", "species pathologic slavicae", "specimen histological slavicae", "specimen pathological survival", "specimen philologica slavicae", "specimen pathological staging"
"specimina philologiae slavicae" » "specimina philologica slavicae", "specimen philosophiae slavicae", "specimina philologica slavica"
"specimina philologie slave" » "specimina philologica slave"

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• If you are trying to use Boolean operators, they must be ALL CAPS: (((("specimens philological slavicae") OR ("specimen pathological slavicae"))) OR ((("specimina philologiae slavicae") OR ("specimina philologie slave")))).
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