How to fix Vietnamese language on mobile?

Hi ThiemVu,
I need a loser look to detect the root of issue. Please provide me the Admin and FTP credentials of your site.
Regards,
Mall.
 

Hi thiem vu,
I have detected your site and see it working fine now. I don’t see the issue as you said.
Can you show me any screenshots about the issue as you said. I will check further and tell you how to solve that issue.
Regards,
Mall.

Hi ThiemVu,
I have re-check your site with IOS, Android… but i don’t see the issue as you said at http://prntscr.com/6i5wpm
You can see this at https://www.dropbox.com/s/p3jwin0yhzutk9h/Screen%20Shot%202015-03-18%20at%2011.04.39.png?dl=0
Can you tell me what is the name of mobile OS you are using?
Regards,
Mall.
 

Hi thiem vu,
Seem your Mobile miss the needed fonts. Please try open the CSS file at /skin/frontend/default/jm_book/css/styles.css
and find to the block code at line 7983:

{
    font-family: ""roboto_slabregular"";
    font-style: normal;
    font-weight: normal;
}

and replace it by block code:

{
    font-family: "Tahoma";
    font-style: normal;
    font-weight: normal;
}

Do it and let me know how it goes.
Regards,
Mall.