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

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 philologiae slavicae") OR ("specimens philologica slavicae")))).
• Removing quotes may allow a broader search: (((( specimen philosophiae slavicae ) or ( species philosophiae slavicae ))) or ((( specimens philologiae slavicae ) or ( specimens philologica slavicae )))).
• Adding a wildcard symbol may retrieve word variants: (((("specimen philosophiae slavicae") or ("species philosophiae slavicae"))) or ((("specimens philologiae slavicae") or ("specimens philologica slavicae"))))*.