If you are using the internal search engine of Drupal to present your search results and you want to exclude some of the nodes of your Drupal site, there are many ways of doing this. You can write yuor own code, make sure different node types are excluded etc. But if you only want to hide a couple of nodes from the internal search result a quick and easy way to do this is to use the "Search exclude NID" module.
You just name the nodes you want to exclude form the search result, and the module does the rest.
Quick and not at all dirty. Nice module.