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

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