Web scraper using regular expression is working but not completely

Question

I'm trying to scrape an HTML webpage using regular expressions. Two of the three MatchCollections work, but the third one does not. I'm getting what i need from match and match_id, but when it comes to match_price, there is no result.

Can someone kindly tell me what is wrong?

WebClient wb = new WebClient();
string s = wb.DownloadString(@"C:\Users\Dell\Desktop\html pages\hi.html");
        MatchCollection match = Regex.Matches(s, "span class=\"\".*?</span>");
        MatchCollection match_id = Regex.Matches(s, "span class=\"product_id\".*?</span>");
        MatchCollection match_price = Regex.Matches(s, "div class=\"col-lg-2 col-md-2 col-sm-2 col-xs-2 align-right\".*?</div>");

foreach (Match m in match)
{
    listBox1.Items.Add(m);
}

foreach (Match m in match_id)
{
    listBox2.Items.Add(m);
}

foreach(Match m in match_price)
{
    listBox3.Items.Add(m);
}