One way to focus your results in OneSearch is to use the Personalize button. 

After conducting a search, switch the Personalize button on to limit your results to up to five subject areas. 

If you wish to prioritize recent results, you can click the Prefer Newer checkbox, as well. 

How Long does Personalize Last?

Personalize is persistent through your search session and will filter any new searches, as well.

If you are signed in to your library account, the Personalize settings will persist across search sessions until you turn them off.

What's Included in Personalize Results? 

A search limited with "Personalize" will generally include mostly online materials.  For a more comprehensive search that includes physical materials, you may need to edit your search terms and turn Personalize off.