For certain complex searches, you might want more control over the results that you see. Try the Advanced Search page 
to see options for making your searches more precise and getting more useful results.
You can reach that page by clicking the 
gear icon in the top right corner of the search results page then clicking Advanced search. You can also visit the page directly at http://www.google.com/advanced_search.
You can use search operators to generate many of these advanced searches right from the regular Google search box. Learn how by looking at the tips on the right side of the Advanced Search page.
