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