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

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