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

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