searxng/searx/templates/simple/messages/no_results.html

{% if unresponsive_engines %}
<div class="alert alert-danger fade in" role="alert">
    <p><strong>{{ _('Error!') }}</strong> {{ _('Engines cannot retrieve results.') }}</p>
    <p>
        {% for engine_name, error_type in unresponsive_engines %}
        {{ engine_name }} ({{ error_type }}){% if not loop.last %}, {% endif %}
        {% endfor %}
    </p>
    <p><small>{{ _('Please, try again later or find another searx instance.') }}</small></p>
</div>
{% else %}
<div class="alert alert-info fade in" role="alert">
    <strong>{{ _('Sorry!') }}</strong>
    {{ _('we didn\'t find any results. Please use another query or search in more categories.') }}
</div>
{% endif %}