Perhaps you should try some spelling variations:
"sub specie aeternitatis" » "sub specic aeternitatis", "sub specimen aeternitatis", "sub specice aeternitatis", "sub spece aeternitatis"
"sub species aeternitatis" » "sub specics aeternitatis", "sub specimens aeternitatis", "sub specices aeternitatis", "sub speces aeternitatis"
"sub speci aeternitatis" » "sub specic aeternitatis", "sub spec aeternitatis"
"sub speck aeternitatis" » "sub speak aeternitatis", "sub speek aeternitatis", "sub spec 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 species aeternitatis"))) or ((("sub speci aeternitatis") OR ("sub speck aeternitatis"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("sub specie aeternitatis") OR ("sub species aeternitatis"))) OR ((("sub speci aeternitatis") OR ("sub speck aeternitatis")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"sub specie aeternitatis\") or (\"sub species aeternitatis\"))) or (((\"sub speci aeternitatis\") OR (\"sub speck aeternitatis\"))))".
• Removing quotes may allow a broader search: (((( sub specie aeternitatis ) or ( sub species aeternitatis ))) or ((( sub speci aeternitatis ) OR ( sub speck aeternitatis )))).
• Adding a wildcard symbol may retrieve word variants: (((("sub specie aeternitatis") or ("sub species aeternitatis"))) or ((("sub speci aeternitatis") OR ("sub speck aeternitatis"))))*.