Perhaps you should try some spelling variations:
"specimens philological slavicae" » "specimen histological slavicae", "specimen pathological slavicae", "specimina philologiae slavicae", "specimens philologica slavica", "specimens philologiae slavicae", "specimens philological polemical", "speciess philological slavicae"
"specimen philosophiae slavicae" » "specimen philologiae slavicae", "specimen philosophiae publice", "specimen philosophiae suae", "species philosophiae slavicae"
"specimina philologica slavicae" » "specimina philologiae slavicae", "specimina philologica slavica", "specimina 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 ((("specimina philologica slavicae") OR ("specimens philological slavicae")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"specimen philosophiae slavicae\") or (((\"specimina philologica slavicae\") OR (\"specimens philological slavicae\"))))".
• Removing quotes may allow a broader search: (( specimen philosophiae slavicae ) or ((( specimina philologica slavicae ) OR ( specimens philological slavicae )))).
• Adding a wildcard symbol may retrieve word variants: (("specimen philosophiae slavicae") or ((("specimina philologica slavicae") OR ("specimens philological slavicae"))))*.