Perhaps you should try some spelling variations:
"1944 Icelandic institucional referendum" » "1944 Icelandic institucional frente"
"1944 Icelandic institucional regreso" » "1944 Icelandic institucional elisa", "1944 Icelandic institucional frente"
"1944 Icelandic constitutional referendum" » "1944 Icelandic constitution referendum", "1944 Icelandic constitucionales referendum", "1944 Icelandic constitucion referendum"
"1944 Icelandic institutional referendum" » "1944 Icelandic institucionales referendum", "1944 Icelandic instituciones referendum", "1944 Icelandic institucion referendum"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("1944 Icelandic constitutional referendum") OR ((((("1944 Icelandic institutional referendum") OR ((("1944 Icelandic institucional referendum") OR ("1944 Icelandic institucional regreso"))))) OR ("1944 Icelandic constitucional referendum"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"1944 Icelandic constitutional referendum\") OR (((((\"1944 Icelandic institutional referendum\") OR (((\"1944 Icelandic institucional referendum\") OR (\"1944 Icelandic institucional regreso\"))))) OR (\"1944 Icelandic constitucional referendum\"))))".
• Removing quotes may allow a broader search: (( 1944 Icelandic constitutional referendum ) OR ((((( 1944 Icelandic institutional referendum ) OR ((( 1944 Icelandic institucional referendum ) OR ( 1944 Icelandic institucional regreso ))))) OR ( 1944 Icelandic constitucional referendum )))).
• Adding a wildcard symbol may retrieve word variants: (("1944 Icelandic constitutional referendum") OR ((((("1944 Icelandic institutional referendum") OR ((("1944 Icelandic institucional referendum") OR ("1944 Icelandic institucional regreso"))))) OR ("1944 Icelandic constitucional referendum"))))*.