Perhaps you should try some spelling variations:
specimina philologica » specimens philological
"specimina philologiae slavica" » "specimens philological slavica", "specimen philosophiae slavica", "specimina philologica slavica", "specimina philologica slavicae", "specimina philologie slave"
"specimina philologiae slavicae" » "specimens philological slavicae", "specimen philosophiae slavicae", "specimina philologica slavicae", "specimina philologica slavica", "specimina philologie slave", "specimina philologica slavicaee", "specimina philologie slavee"
specimina philologie » specimens philological

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 philologiae slavica") OR ("((specimina philologie) OR (specimina philologica)) slave"))) OR ("specimina philologiae slavicae")).
• Removing quotes may allow a broader search: (((( specimina philologiae slavica ) or ( ((specimina philologie) OR (specimina philologica)) slave ))) or ( specimina philologiae slavicae )).
• Adding a wildcard symbol may retrieve word variants: (((("specimina philologiae slavica") or ("((specimina philologie) OR (specimina philologica)) slave"))) or ("specimina philologiae slavicae"))*.