Perhaps you should try some spelling variations:
"specimen philosophiae slavicae" » "specimen philologiae slavicae", "specimen philosophiae publice", "specimen philologica slavicae"
"specimen philologie slave" » "specimina philologiae slave", "specimens philological slave", "specimina philologica 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 ("specimen philologie slave")).
• Removing quotes may allow a broader search: (( specimen philosophiae slavicae ) or ( specimen philologie slave )).
• Adding a wildcard symbol may retrieve word variants: (("specimen philosophiae slavicae") or ("specimen philologie slave"))*.