Many fantastic public policy resources--in particular, policy briefs from think tanks, NGOs, and research institutes--can be found online. Here are a few tips for more efficient, effective Google searches:
Include policy in your search
do a site: search which limits the search to a specific domain. try: .org sites, .edu sites, .gov sites
or you may access a certain website for example: http://nzinitiative.org.nz/
If you're not sure which think tank, NGO, or agency might have issued policy papers on your topic, try a search engine that's powered by Google but limited to a select group of sites.