The best way to construct a complex segment is to draw it as a Venndiagram first. Because each field applies totally separately to your dataset, you can use OR to tell Google Analytics to get any visits that match anything in your diagram, or AND...
Click the "venndiagram (three circles) icon" and you'll see which cluster(s) contain the item. A "hidden" feature of a powerful meta search engine allows you to mine for gold in the blogosphere. What's "the best" weblog/RSS engine?
This interactive tool lets you enter a query and then displays unique and overlapping results on a Venn-diagram, and tells you exactly how many unique and overlapping results are found on Yahoo, Google and MSN.
Also, on the right side of the page you'll see a Venndiagram that illustrates each type of search. Results pages on Jux2, the 2005 Search Engine Watch Award winner for best meta search engine have just received a makeover.