Perhaps you should try some spelling variations:
"speciess philosophiae slavicae" » "specimen philosophiae slavicae", "species philosophy slavicae", "spencers philosophie slavicae", "speciess philosophiae publice", "speciess philosophiae suae"
"species philosophers slavicae" » "species philosophers france", "species philosophers have", "species philosophers american", "species philosophy slavicae", "sciences philosophers slavicae", "grecian philosophers slavicae"
"specimens philologica slavicae" » "specimens philological slavicae", "specimina philologica slavicae", "specimina philologiae slavicae", "specimens philologica slavica", "specimens philologie slave", "specimens philologica sive"
"specimen philosophie islamic" » "specimen philosophiae islamic", "medien philosophie islamic", "species philosophy islamic", "specimen philosophy islamic", "specimen philosophie analytic", "specimen philosophie bismarck"
"specimen philologiae slavicae" » "specimina philologiae slavicae", "specimens philological slavicae", "specimen philosophiae slavicae", "specimen philologica slavica", "specimen philologie slave"

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• If you are trying to use Boolean operators, they must be ALL CAPS: (((("specimen philosophie islamic") OR ("specimen philologiae slavicae"))) OR ((((("species philosophers slavicae") OR ("speciess philosophiae slavicae"))) OR ("specimens philologica slavicae")))).
• Removing quotes may allow a broader search: (((( specimen philosophie islamic ) or ( specimen philologiae slavicae ))) or ((((( species philosophers slavicae ) or ( speciess philosophiae slavicae ))) or ( specimens philologica slavicae )))).
• Adding a wildcard symbol may retrieve word variants: (((("specimen philosophie islamic") or ("specimen philologiae slavicae"))) or ((((("species philosophers slavicae") or ("speciess philosophiae slavicae"))) or ("specimens philologica slavicae"))))*.