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 philologica slavicae", "speciess philosophiae slavicae"
"specimen philosophiae slavicae" » "specimen philologiae slavicae", "specimen philosophiae publice", "specimen philologica slavicae", "species philosophiae slavicae"

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"specimen philosophiae slavicae\") OR (\"specimens philosophiae slavicae\"))*".
• Removing quotes may allow a broader search: (( specimen philosophiae slavicae ) OR ( specimens philosophiae slavicae ))*.