Perhaps you should try some spelling variations:
"march 13th a" » "march 13 a", "march 13th _", "march 13th c", "march 13th day"
"march 14th a" » "march 14 a", "march 14th _", "march 14th c", "march 14th day"
"march 11th a" » "march 11 a", "march 11th ag", "march 11th _", "march 11th 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: (("march 13th a") OR ((("march 14th a") OR ("march 11th a")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"march 13th a\") or (((\"march 14th a\") OR (\"march 11th a\"))))".
• Removing quotes may allow a broader search: (( march 13th a ) or ((( march 14th a ) OR ( march 11th a )))).
• Adding a wildcard symbol may retrieve word variants: (("march 13th a") or ((("march 14th a") OR ("march 11th a"))))*.