Perhaps you should try some spelling variations:
"specimens philosophiae slavicae" » "species philosophy slavicae", "species philosophers slavicae", "specimens philological slavicae", "specimens philologiae slavicae", "specimens philosophiae publice", "specimens philosophiae suae", "speciess philosophiae slavicae"
"specimen philosophiae slavicae" » "specimen philologiae slavicae", "specimen philosophiae publice", "specimen philosophiae suae", "species philosophiae slavicae"
"specimina philologica slavicae" » "specimina philologiae slavicae", "specimens philological slavicae", "specimina philologica slavica", "specimina philologie slave"

You may be able to get more results by adjusting your search query.

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