Perhaps you should try some spelling variations:
"specimina philologica slave" » "specimina philologiae slave", "specimens philological slave", "specimina philologie slave", "specimina philologica sive", "specimina philologica slavicae"
"specimen philosophiae suae" » "specimen philosophicae sive", "specimen philosophicae quas", "specimen philosophiae essay"

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: (("specimina philologica slave") OR ("specimen philosophiae suae"))*.
• Removing quotes may allow a broader search: (( specimina philologica slave ) or ( specimen philosophiae suae ))*.