Multiple Site Search

[Islander]

If your site is something of a complex type, for example you have a site on vehicles; you have a section for car and another one for motorcycles.
On the motorcycle index page you want to have a search box only for motorcycles types etc,... and the same thing for the cars index page.

Divide your project into two; not practical perhaps but it can be more efficient.

Create a search box for each project and name their search indexes differently: searchindex_cars & searchindex_moto.