Just as your baseball card or your address book has different types of information by which you could organize your information, so does the database. Doing a keyword search or fulltext search is as close to a Google search as you will get in a database -- this searches every word in the article for the words you have requested. You could search for your topic, President Bush, using a key-word search and see what happens. But is there a better way?
Expert searchers rarely do a key word search. They have learned that, just like a search engine, keyword searches return too many articles that have no value to your research.
These researchers will usually start with a subject search. Most databases open to a subject search screen for just this reason. A subject search only looks at terms that have been assigned to the article by an indexer. If the subject search doesn't find the information, however, use another type of search.