Perhaps you should try some spelling variations:
specimina philologica » specimina philologiae, specimens philological
philologica slavicae » philologica slavica, philologiae slavicae, philologie slave
philosophiae suae » philosophicae sive, philosophicae quas, 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 slavicae ) OR ( specimen philosophiae suae )).
• Adding a wildcard symbol may retrieve word variants: (( specimina philologica slavicae ) or ( specimen philosophiae suae ))*.