So, i just install a software called xCHM to read .chm file. xCHM can show the content tree if one is available, print pages, change font face and size, remember bookmarks, display a searchable index, and search for words in the current page and the whole book.
How to install it? Just follow the following steps:-
a) Login as root user
b) Type the following command to install it
yum install -y xchm
After that, you try to double click the .chm file, you should able to open it with xchm program.