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