As with our other searchers, if the word "and" appears in your list of keywords, an AND rather than OR match will be done (selected files will have to contain all of the keywords you specify, rather than any of them). If you're looking for AIX problems therefore, try "AIX and problem".
You'll be presented with a list of pages that matched your criteria, which you can then browse easily. You should be able to hop right to your desired subject. Let me know if you have problems using this page.