Perhaps you should try some spelling variations:
"sub speci aeternitatis" » "sub specic aeternitatis", "sub speck aeternitatis", "sub specki aeternitatis", "sub spei aeternitatis", "sub peci aeternitatis"
"sub spei aeternitatis" » "sub pei aeternitatis", "sub spe aeternitatis", "sub sped aeternitatis"
"sub spec aeternitatis" » "sub speck aeternitatis", "sub spe aeternitatis", "sub pec 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 speci aeternitatis") OR ("sub spei aeternitatis"))) or ("sub spec aeternitatis"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("sub speci aeternitatis") OR ("sub spei aeternitatis"))) OR ("sub spec aeternitatis")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"sub speci aeternitatis\") OR (\"sub spei aeternitatis\"))) or (\"sub spec aeternitatis\"))".
• Removing quotes may allow a broader search: (((( sub speci aeternitatis ) OR ( sub spei aeternitatis ))) or ( sub spec aeternitatis )).
• Adding a wildcard symbol may retrieve word variants: (((("sub speci aeternitatis") OR ("sub spei aeternitatis"))) or ("sub spec aeternitatis"))*.