It is the default option. Obviously this will give you a much bigger amount of results. The results that include many of the searched words are ranked highter though. This option is quite useful, for instance, when you don't know how a word is spelled correctly. You'll often be searching for a word pattern that appears just as you've typed it.
Examples are full names or phrases.
Operators in the search string Instead of selecting one of the three search options it is also possible to include operators directly in the search string. This possibility allows it to be highly specific and therefore improves your search results. For a detailed description on this check out the AOL NetFind search help on Boolean Operators . You wouldn't know it by browsing the Web, but they still publish magazines that have nothing to do with computers. If you wanted to find information on magazines other than those related to computers, AOL NetFind can help you do that.