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