Perhaps you should try some spelling variations:
"marcus morton a" » "mark morton a", "marcus morton _", "marcus merton a", "marcus morton h"
"march 11th a" » "march 13th a", "march 11 a", "march 11th ag", "march 11th _", "march 11th day"
"march 14th a" » "march 13th a", "march 14 a", "march 14th _", "march 14th c", "march 14th day"

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (("marcus morton a") OR ((("march 11th a") OR ("march 14th a")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"marcus morton a\") or (((\"march 11th a\") OR (\"march 14th a\"))))".
• Removing quotes may allow a broader search: (( marcus morton a ) or ((( march 11th a ) OR ( march 14th a )))).
• Adding a wildcard symbol may retrieve word variants: (("marcus morton a") or ((("march 11th a") OR ("march 14th a"))))*.