Perhaps you should try some spelling variations:
"specimens philosophiae slavicae" » "specimen philosophiae slavicae", "species philosophy slavicae", "species philosophers slavicae", "specimens philosophiae publice", "specimens philologica slavicae", "specimens philosophie islamic"
"specimens philosophiae suae" » "specimen philosophiae suae", "species philosophy suae", "species philosophers suae", "specimens philosophicae sive", "specimens philosophicae quas", "specimens philosophiae essay"
"specimina philologiae slavicae" » "specimina philologica slavicae", "specimens philological slavicae", "specimen philosophiae 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: (((("specimens philosophiae slavicae") OR ("specimens philosophiae suae"))) OR ("specimina philologiae slavicae")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"specimens philosophiae slavicae\") OR (\"specimens philosophiae suae\"))) or (\"specimina philologiae slavicae\"))".
• Removing quotes may allow a broader search: (((( specimens philosophiae slavicae ) OR ( specimens philosophiae suae ))) or ( specimina philologiae slavicae )).
• Adding a wildcard symbol may retrieve word variants: (((("specimens philosophiae slavicae") OR ("specimens philosophiae suae"))) or ("specimina philologiae slavicae"))*.