To look for sources other than Web pages, use a specialized database. Use more than one search engine. There is little overlap between search engines, so it is likely that you will find unique pages in each search engine. Ignore capitalization in your search terms. Consult the Help pages offered by individual search engines.
All search engines provide a description of how to best search their system.
Look for a link labeled Help or Tips on the search engine home page, or use the links provided on the Major Search Sites page. Some search engines will indicate the total number of pages found in your search. In reviewing your results, be sure to look through the first 20 or 30 items. You may need to try several different approches to your search. In choosing search terms, remember to think in terms of what words might appear on the Web page.