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

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• If you are trying to use Boolean operators, they must be ALL CAPS: (((("specimens philologica slavicae") OR ("specimen histological slavicae"))) OR ((("specimina philologiae slavicae") OR ("specimina philologie slave")))).
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