def METHOD_NAME(self) -> str:
    """ Return the ICU rules to be used during search.
        The rules combine normalization and transliteration.
    """
    # First apply the normalization rules.
    rules = io.StringIO()
    rules.write(self.normalization_rules)
    # Then add transliteration.
    rules.write(self.transliteration_rules)
    return rules.getvalue()