Perhaps you should try some spelling variations:
"specimens philosophiae slavicae" » "specimen philosophiae slavicae", "species philosophy slavicae", "species philosophers slavicae", "specimens philosophiae publice", "specimens philosophie islamic"
"specimens philosophiae suae" » "specimen philosophiae suae", "species philosophy suae", "species philosophers suae", "specimens philosophicae sive", "specimens philosophicae quas", "specimens philosophiae essay"
"specimens philologica slavicae" » "specimens philological slavicae", "specimina philologica slavicae", "specimina philologiae slavicae", "specimens philologica slavica", "specimens philologie slave", "specimens philologica sive"
"specimen philologiae slavicae" » "specimina philologiae slavicae", "specimens philological slavicae", "specimen philosophiae slavicae", "specimen philologica slavica", "specimen 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 philologiae slavicae") OR ((((("specimens philosophiae slavicae") OR ("specimens philosophiae suae"))) OR ("specimens philologica slavicae")))).
• Removing quotes may allow a broader search: (( specimen philologiae slavicae ) or ((((( specimens philosophiae slavicae ) or ( specimens philosophiae suae ))) or ( specimens philologica slavicae )))).
• Adding a wildcard symbol may retrieve word variants: (("specimen philologiae slavicae") or ((((("specimens philosophiae slavicae") or ("specimens philosophiae suae"))) or ("specimens philologica slavicae"))))*.