These are the basic instructions for wildcard searching in the Mariage Recherche page. They need to be translated into French.
When searching for individual words (n'importe quel mot, tous ces mots), you can use wildcards in your search. ? (a question mark) matches zero or one character, and * (an asterisk) matches zero or more characters. Thus "mar?" would match both "mari" and "mary", while "mar*" would match "mari", "mary", "marié" and "mariée". You can't use wildcard searches in the "phrase exact" search, because it is searching for an exact phrase.