|AND||Narrow Search||Apples AND Oranges|
|OR||Expand Search||Apples OR Oranges|
|NOT||Remove Results||Fruit NOT Oranges|
|*||Truncate Word||Politic* = politic, politics, political, politician|
|?||Substitute Letters||Wom?n = women, woman|
Identify keywords from your topic that you have discovered during your background research.
Combine these with words like "origin" or "cause". Also, consider applying these keywords with other terms that you have identified from discussions and readings on theory.