Adobe software provide the options to access the Adobe help on web or locally present on the machine.
C:\Program Files (x86)\Adobe\Adobe Help
and open the Adobe Help.exe file.
This is what you can say the control centre of Adobe help,
under "General Settings" you will have the option to show "Display local help content omly" , on selecting "YES" it will open the locally saved help file when clicked Help ...
Thanks, but I forgot to mention that I am on a Mac.
But still: even if I do as you say (as I did), opening Help from within an App will still launch the Internet browser, even if the option is set to local content only.
Have you downloaded the content in Adobe help.exe, if the content is avaiable locally then it will look online.
So, download the help file first and then select the option to view the contact Locally.
Check these Link , they may help :-