Is it possible to search just notes. When I select Notes and do a search, the results not only ignore that % notation, the search results include both article text and notes. That combined with ignoring the % means a lot of false positives.
I did find that, if I have a Instapaper app screen of notes then, while it displays all the notes with Iran and nuclear, it also displays my % notes. I can then use Cmd-F to so a search of all that text and it will find words with that % prefix only.
Long term, you might want to give the computer apps the ability to data mine, Users could search for words in article text, keywords or whatever, getting a list of articles. They could then select those articles that are relevant to their purpose and save them either as an Instapaper-linked list to the articles in Instapaper or to a document that contains all the articles.
http://blog.instapaper.com/post/120705386086