The site-search method in Google can help you locate profiles of passive candidates from various networking sites.

The Google search syntax is
site:(site name) (keyword) (state)

For example, to search for LinkedIn profiles of Pharmacists from California, you can try the following search string in Google:

site:www.linkedin.com (pharmacist) (CA) -inurl:directory

By including this search method in your passive candidate sourcing process, you can easily build passive prospect lists from LinkedIn.