Perhaps you should try some spelling variations:
"sub specke aeternitatis" » "sub speckle aeternitatis", "sub speck 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.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("sub specke aeternitatis") or ("sub specice aeternitatis"))) or ("sub speci aeternitatis"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("sub specke aeternitatis") OR ("sub specice aeternitatis"))) OR ("sub speci aeternitatis"))*.
• Removing quotes may allow a broader search: (((( sub specke aeternitatis ) or ( sub specice aeternitatis ))) or ( sub speci aeternitatis ))*.