Thus, using OR will typically produce more results than using AND . Deciding if and when to use Boolean terms depends on how much information you re looking for and how specific you want that information to be. Using Wildcards Wildcard search keys allow you to search using only parts of words. To make sure that your search includes plurals or alternate spellings and endings you would use a wildcard search. In this case, each question mark replaces a single character and the search is limited to words which are seven letters in length.
Every search is different.
Some databases use the question mark as a single letter wildcard, while others use it as the truncation symbol, and others don t recognize it at all. You have to become familiar with your particular search engine or database before you can use these more advanced search features.