Perhaps you should try some spelling variations:
"sub specimens aeternitatis" » "sputum specimens aeternitatis", "sub speciess aeternitatis", "sub specicmens aeternitatis", "sub specmens aeternitatis", "sub speckmens aeternitatis"
"sub specimen aeternitatis" » "sub species aeternitatis", "sub specicmen aeternitatis", "sub specmen aeternitatis", "sub speckmen aeternitatis"
"sub speci aeternitatis" » "sub specic aeternitatis", "sub spec aeternitatis", "sub speck aeternitatis"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("sub specimen aeternitatis") OR ("sub specimens aeternitatis"))) or ("sub speci aeternitatis"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("sub specimen aeternitatis") OR ("sub specimens aeternitatis"))) OR ("sub speci aeternitatis")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"sub specimen aeternitatis\") OR (\"sub specimens aeternitatis\"))) or (\"sub speci aeternitatis\"))".
• Removing quotes may allow a broader search: (((( sub specimen aeternitatis ) OR ( sub specimens aeternitatis ))) or ( sub speci aeternitatis )).
• Adding a wildcard symbol may retrieve word variants: (((("sub specimen aeternitatis") OR ("sub specimens aeternitatis"))) or ("sub speci aeternitatis"))*.