Perhaps you should try some spelling variations:
"sub specimens aeternitatis" » "sputum specimens aeternitatis", "sub specicmens aeternitatis", "sub specmens aeternitatis", "sub speckmens aeternitatis"
"sub species aeternitatis" » "sub specices aeternitatis", "sub speces aeternitatis", "sub speckes 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 specimens aeternitatis") or ("sub species aeternitatis"))) or ("sub speci aeternitatis"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("sub specimens aeternitatis") OR ("sub species aeternitatis"))) OR ("sub speci aeternitatis")).
• Removing quotes may allow a broader search: (((( sub specimens aeternitatis ) or ( sub species aeternitatis ))) or ( sub speci aeternitatis )).
• Adding a wildcard symbol may retrieve word variants: (((("sub specimens aeternitatis") or ("sub species aeternitatis"))) or ("sub speci aeternitatis"))*.