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

man MilitaryBenefitAssnSupportsNatlGuardExecDirAssn

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