Perhaps you should try some spelling variations:
"specimens philological slavicae" » "specimina philologica slavicae", "specimen histological slavicae", "specimens radioecological slavicae", "specimens philologica slavicae", "specimens philologica slavica", "specimens philological polemical"
"species physiological slavicae" » "species physiological saline", "species philologica slavicae", "species physiological space", "specific physiological slavicae", "acids physiological slavicae", "species biological slavicae"
"specimina philologiae slavicae" » "specimina philologica slavicae", "specimen philosophiae slavicae", "specimina philologica slavica", "specimina philologie slave"
"specimen pathological slavicae" » "specific pathological slavicae", "species pathologic slavicae", "specimen histological slavicae", "specimen pathological survival", "specimen philologica slavicae", "specimen pathological staging"

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