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

man Airmail-YourMailWithYouProductivityiPhone&iPodTouchApp

No manual entry for Airmail-YourMailWithYouProductivityiPhone&iPodTouchApp.
To search for "Airmail-YourMailWithYouProductivityiPhone&iPodTouchApp", try typing ls Airmail-YourMailWithYouProductivityiPhone&iPodTouchApp.