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

Try widening your search to All Fields.

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