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

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"specimen philosophiae slavicae\") OR (((\"specimens philosophiae slavicae\") OR (((\"specimina philologica slavicae\") OR (\"specimina philologie slave\"))))))".
• Removing quotes may allow a broader search: (( specimen philosophiae slavicae ) OR ((( specimens philosophiae slavicae ) OR ((( specimina philologica slavicae ) OR ( specimina philologie slave )))))).
• Adding a wildcard symbol may retrieve word variants: (("specimen philosophiae slavicae") OR ((("specimens philosophiae slavicae") OR ((("specimina philologica slavicae") OR ("specimina philologie slave"))))))*.