Perhaps you should try some spelling variations:
"specimens philological slavica" » "specimen pathological slavica", "species physiological slavica", "specimens radioecological slavica", "specimens philologica slavica", "specimens philological polemical", "specimens philological satirical"
"specimina philologiae slavicae" » "specimen philosophiae slavicae", "specimina philologica slavica", "specimina philologie slave"
"specimen histological slavica" » "specimen pathological slavica", "special histologic slavica", "aspects histological slavica", "specimen histological staging", "specimen philologica slavica", "specimen histological slices"
"specimina philologica slavicae" » "specimina philologica slavica", "specimina philologie slave", "specimina philologica sive"

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("specimina philologica slavicae") OR ((("specimina philologiae slavicae") OR ((("specimens philological slavica") OR ("specimen histological slavica")))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"specimina philologica slavicae\") or (((\"specimina philologiae slavicae\") or (((\"specimens philological slavica\") OR (\"specimen histological slavica\"))))))".
• Removing quotes may allow a broader search: (( specimina philologica slavicae ) or ((( specimina philologiae slavicae ) or ((( specimens philological slavica ) OR ( specimen histological slavica )))))).
• Adding a wildcard symbol may retrieve word variants: (("specimina philologica slavicae") or ((("specimina philologiae slavicae") or ((("specimens philological slavica") OR ("specimen histological slavica"))))))*.