I want to know whether Google crawl pages like

http://herbsandcures.com/viewdisease...?disease_id=13

becoz these pages are highly rich in specific text contents but are not being shown in google..

Plz suggest me.

Google will index dynamic URL's as long as there are no more than 2 parameters.

From Google
http://www.google.com.au/webmasters/2.html#A2

Your pages are dynamically generated. We're able to index dynamically generated pages. However, because our web crawler could overwhelm and crash sites that serve dynamic content, we limit the number of dynamic pages we index. In addition, our crawlers may suspect that a URL with many dynamic parameters might be the same page as another URL with different parameters. For that reason, we recommend using fewer parameters if possible. Typically, URLs with 1-2 parameters are more easily crawlable than those with many parameters.

If the only way to get to those URLs is from another page with a parameter they may not get crawled.

But as your site is only 6 months old, it will still be in the ageing delay.