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

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• If you are trying to use Boolean operators, they must be ALL CAPS: (((((("specimens philological slavicae") OR ("specimen pathologicall slavicae"))) OR ("specimens philologica slavica"))) OR ("specimina philologiae slavicae")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"specimens philological slavicae\") OR (\"specimen pathologicall slavicae\"))) or (\"specimens philologica slavica\"))) or (\"specimina philologiae slavicae\"))".
• Removing quotes may allow a broader search: (((((( specimens philological slavicae ) OR ( specimen pathologicall slavicae ))) or ( specimens philologica slavica ))) or ( specimina philologiae slavicae )).
• Adding a wildcard symbol may retrieve word variants: (((((("specimens philological slavicae") OR ("specimen pathologicall slavicae"))) or ("specimens philologica slavica"))) or ("specimina philologiae slavicae"))*.