The search facility in this web site allows searching on single words, phrases or full sentences. The search engine finds pages that best match the words and phrases in a free-text query. This is done by automatically finding pages that match the meaning, not the exact wording, of the query. For common words, this may produce a large number of pages in the search results so it is helpful to use refining words to reduce the number of pages returned.
For example, searching for the Nielsen Media Research product "Ad*Views Reporter" will also find pages with "Ad", "Views" and "report".