xpath to get Node containing text

I tried to search for nodes containing text 'Yahoo' under '/doc/story/content', it returns 'content' node, but I need exact text node that contains 'Yahoo' or it's parent

<doc>
    <story>
        <content id="201009281450332423">
            <ul>MSW NYNES NYPG1 DILMA</ul>
            <p> <k> Yahoo, made </k> it nice </p>
            <p>
               <author>-v-</author>
            </p>
        </content>
    </story>
</doc>

Xpath: "/doc/story/content[contains(., 'Yahoo')]"