Type in a command, or "ls dictionary" to search all commands for "dictionary", etc.

man SamsungGalaxyS8FrontAndBackCaseCover

No manual entry for SamsungGalaxyS8FrontAndBackCaseCover.
To search for "SamsungGalaxyS8FrontAndBackCaseCover", try typing ls SamsungGalaxyS8FrontAndBackCaseCover.