Perhaps you should try some spelling variations:
"specimina philologica slavic" » "specimina philologiae slavic", "specimens philological slavic", "specimina philologica slavicae", "specimina philologiae slavicae", "specimina philologie slave"
"specimina philologica slavica" » "specimina philologiae slavica", "specimens philological slavica", "specimina philologica slavicaea", "specimina philologiae slavicaea", "specimina philologie slavea", "specimina philologica slavicae"
"specimen pathological slavic" » "specific pathological slavic", "specimens philological slavic", "species pathologic slavic", "specimen pathological staging", "specimen pathological states", "specimen pathological basis"
"specimen pathological synaptic" » "specific pathological synaptic", "specimens philological synaptic", "species pathologic synaptic", "specimen pathological synopsis", "specimen morphological synaptic", "specimen physiological synaptic"

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