Creating a page every time someone performs a search could probably spiral out of control pretty quickly. If you have a certain amount of 'page rank', based on all of the back links you have, that page rank will get shared to all of the pages that you have across your site.
One way you could more naturally control what gets indexed, is by what you link to from your home page. For instance, if you track the most blocked big sites, as well as the most blocked keywords, and have those pages 1 link from your homepage, you could expect those to get indexed naturally when your site is spidered.
As you get more links from other sites, and your trust from the search engines and page rank grows, you should be able to support more pages getting indexed across your site.
There is the issue of your site contents potentially being regarded as 'thin content', since many of the pages appear to be the same from page to page.
One question I had - I saw your site hosts both Chinese language words and English language words, and checks whether those words are being filtered. Perhaps it would make more sense to only show the words in Chinese characters on the zh. subdomain, and the English words on the en. subdomain? Just a thought. Is there any difference between the zh and en subdomains, aside from the language of the template?
Really interesting website.
