I am not sure I understand your question, but if you want to post something that will appear if somebody searches for a specific hashtag, e.g. Amazon, you should just mention it in your tweet, e.g. "My latest book is on #amazon, see http://link.html"
Then if somebody searches for #amazon, your tweet will appear. But maybe you were asking something else.
EDIT: just took the liberty to look at your twitter page: I don't think you should put the hashtag symbol before
the link, but before any keyword that you want to direct people to your tweets. For instance, if you want it to be found by people looking for the word "mistake" you would tweet
What can a mother do when she has no money and a dangerously sick kid? She can make a #mistake. Now she'll pay. http://amzn.to/10onVdH #free