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