The Objective of the Site:
The goal of this website (sunnah.com) is to provide the first online, authentic, searchable, and multilingual (English/Arabic at the individual hadith level) database of collections of hadith from our beloved Prophet Muhammad, peace and blessings be upon him.
Therefore, you can search in English or Arabic. Not only will the Arabic come up, but the translation too.
Some of the books on the site: