import re


def find_all_file_matches(file_names, file_name_re):
    """
    Return a list of all file_names that matched the regular expression.
    """
    matching_file_names = []
    for _file in file_names:
        if re.search(file_name_re, _file):
            matching_file_names.append(_file)

    return matching_file_names