To increase the number or results on your topic you can use:
Use the asterisk * as a suffix to find all the variations of a word.
The search politic* finds:
political, politics, politician, politician, etc.
Use the word OR to search for various synonyms for your topic.
You can combine both the asterisk and OR to increase your results even more.
The search above looks for the phrase "white house" as well as various forms of the word president (president, presidents, president's, presidential).
The EBSCO databases such as Public Affairs Index, Academic Search Elite, and PsycINFO, can be searched in combination to increase your number of results. To do this first open a single database such as Public Affairs Index and then click on the "Choose Databases" option at the top of the search page.
Then check the box in front of every database you want to search simultaneously ... and then click on OK.
Three options for focusing your search include: