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"

Try widening your search to All Fields.

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