Perhaps you should try some spelling variations:
"sub specm aeternitatis" » "sub pecm aeternitatis", "sub speci aeternitatis", "sub speck aeternitatis", "sub specim aeternitatis", "sub speckm aeternitatis", "sub spem aeternitatis"
"sub peci aeternitatis" » "sub speci aeternitatis", "sub pei aeternitatis", "sub pec aeternitatis"
"sub spec aeternitatis" » "sub speci aeternitatis", "sub speck aeternitatis", "sub spe 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 specm aeternitatis") or ("sub peci aeternitatis"))) or ("sub spec aeternitatis"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("sub specm aeternitatis") OR ("sub peci aeternitatis"))) OR ("sub spec aeternitatis")).
• Removing quotes may allow a broader search: (((( sub specm aeternitatis ) or ( sub peci aeternitatis ))) or ( sub spec aeternitatis )).
• Adding a wildcard symbol may retrieve word variants: (((("sub specm aeternitatis") or ("sub peci aeternitatis"))) or ("sub spec aeternitatis"))*.