Perhaps you should try some spelling variations:
"sub specie aeternitatis" » "sub species aeternitatis", "sub specic aeternitatis", "sub specimen aeternitatis", "sub specice aeternitatis", "sub spece aeternitatis", "sub specke aeternitatis"
"sub specice aeternitatis" » "sub specic aeternitatis", "sub specimen aeternitatis", "sub specicce aeternitatis", "sub specce aeternitatis", "sub speckce 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 specice aeternitatis"))) OR ("sub speci aeternitatis"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"sub specie aeternitatis\") OR (\"sub specice aeternitatis\"))) or (\"sub speci aeternitatis\"))~".
• Removing quotes may allow a broader search: (((( sub specie aeternitatis ) OR ( sub specice aeternitatis ))) or ( sub speci aeternitatis ))~.
• Adding a wildcard symbol may retrieve word variants: (((("sub specie aeternitatis") OR ("sub specice aeternitatis"))) or ("sub speci aeternitatis"))*.