It is sometimes frustrating to use the two forum search options. If you have the same experience you might try giving the job to Google - it is very good at it. Here's how:
From the search box at http://www.google.com/
enter the search query then a space followed by; site:pclinuxos.com/forum/
for example: yum site:pclinuxos.com/forum/
Edit: I realize it is common knowledge - even saw it mentioned somewhere on the forum as I looked for something else. I knew about it and forgot it for years. When you suffer from memory loss of these little things it's good to get a reminder.