Website URL Clickable link

Anyone Help me Please ! I use the Responsive Real Estate Theme.

This is my website link :https://khachsanbooking.com/
I created an clickable link which called “BOOK NOW” in the front page and in the listing page. But when I click on that it don’t go to the link I want, Ex: Google.com, but the link will point to http://www.mysite.com/google.com, and in the listing page it point to the http://www.mysite.com/listing/listing-name/google.com.

In the admin > Theme Options > Display Setup > Content Layout > Listing Page Display > Customize , I added the code as below :

BOOK NOW

and the same code i In the admin > Theme Options > Display Setup > Content Layout > Search Results Display > Customize :

BOOK NOW

1) Please help me to insert the right code please .

2) In the front page I want to add more space between 2 button “BOOK NOW” button and “More Details”, what code should I do please !

Thanks a lot !
Trung