You can choose to limit your search by language, date, publication type, and other ways by making your choice(s) on the lower portion of the Advanced Search screen (which is the default search screen). (See screen shot below.)
Some of these same options are available from the Basic search screen, too. Some of the most frequently used options are highlighted with the arrows in the screen shot below.
Apply Related Words—expands your search by including synonyms and plurals of your term