Perhaps you should try some spelling variations:
"sub specie aeternitatis" » "sub specic aeternitatis", "sub specimen aeternitatis", "sub specice aeternitatis", "sub spece aeternitatis", "sub specke aeternitatis"
"sub species aeternitatis" » "sub specics aeternitatis", "sub specimens 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.

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("sub specie aeternitatis") OR ("sub species aeternitatis"))) OR ("sub speci 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\"))~".
• Removing quotes may allow a broader search: (((( sub specie aeternitatis ) OR ( sub species aeternitatis ))) or ( sub speci aeternitatis ))~.
• Adding a wildcard symbol may retrieve word variants: (((("sub specie aeternitatis") OR ("sub species aeternitatis"))) or ("sub speci aeternitatis"))*.