Perhaps you should try some spelling variations:
"sub specific aeternitatis" » "_ specific aeternitatis", "subject specific aeternitatis"
"sub specie aeternitatis" » "sub speci aeternitatis", "sub specic aeternitatis", "sub specimen aeternitatis"
"sub species aeternitatis" » "sub specis aeternitatis", "sub specics aeternitatis", "sub specimens 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 specie aeternitatis") or ("sub specific aeternitatis"))) or ("sub species aeternitatis"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("sub specie aeternitatis") OR ("sub specific aeternitatis"))) OR ("sub species aeternitatis")).
• Removing quotes may allow a broader search: (((( sub specie aeternitatis ) or ( sub specific aeternitatis ))) or ( sub species aeternitatis )).
• Adding a wildcard symbol may retrieve word variants: (((("sub specie aeternitatis") or ("sub specific aeternitatis"))) or ("sub species aeternitatis"))*.