Do a Yahoo! search for 'cordless phone' and check out the number one. Well, at least the word Cordless is there.... Ah, relevancy, where for art thou?
Try to figure out why they are number 1 and then apply that to your site. I aggree that Yahoo sucks, but with any SE, if you can figure out what is helping a site to rank, you can use that to imrove your position.