Search engines have different search rules. Some engines will search entire texts on a site, while others search only titles or summaries. Check the Help screens to use any search engine more efficiently. Use quotation marks for phrases.
Advanced search offers other options via drop down menus.
You may use lots of terms to describe what you want. This is supposed to increase accuracy. You can limit searches by type of technology i.e. image, shockwave, video and audio. Also has links to current news. Northern Lights also allows Boolean searches using and , or , and not .