Samsung PN51E6500EFXZA - Manual (Page 347)

2. Enter a keyword using your remote.
The keyword should be part of the
name of an application. For example,
enter f-a-c-e to search for Facebook.
3. When done, select
OK at the bottom
of the keyboard.
4. Wait until the search result screen
displays. After Samsung Apps
displays the results, you can select
an application you want in the search
result screen.