from typing import Iterable


def get_unreadable_characters(
    name: str,
    character_combinations: Iterable[str],
) -> str:
    """
    Check if name contains unreadable characters.

    >>> get_unreadable_characters('hello_world', [])
    ''

    >>> get_unreadable_characters('BaseViews', ['O0'])
    ''

    >>> get_unreadable_characters('StillItems', ['lI', '0O'])
    'lI'

    >>> get_unreadable_characters('_', ['O0', '1l'])
    ''

    """
    for combination in character_combinations:
        if combination in name:
            return combination
    return ''