Here is an update on the problem from the ticked opened by WA.
WA Engineering reports and I quote "we don't have any control on the results that are being returned by Search for BOSS, or any control over what content to read on your site pages. Search for BOSS return the results that are being returned from the the Yahoo Search for BOSS API, which is controlled by the indexing of the pages."
From what I can tell, content is indexed by BOSS. However, repeated testing shows what I believe might be limitation of BOSS, or a bug. Anytime my search word or phrase included a hyphen, I got "no results". I tried a number of hyphenated words that appear on my site such as e-Commerce, full-service Web Design, in-depth knowledge of web design, etc. Note that the main Yahoo search was fine. Only BOSS failed to display search results for hyphenated words.
I know the hyphenated word has been indexed because if I search using the words that precede or follow the hyphenated word, I get the results I should, including the hyphenated word appearing as part of the returned text. I just cannot use a hyphenated word in the search phrase.