link:
maps.googleapis.com/maps/api/js?v=3.exp&sensor=false&key=AIzaSyCy_4uhNbFtI4eG4Tu_090Sy0BYTwhYIn8

Dear sir

I checked your source code, your api link hasn't api key. You can see screenshot:
prntscr.com/el0evh
Because you are using other theme, you should check this link in \modules\mod_sj_contact_ajax\tmpl\default.php
change the link to:
<script src="maps.googleapis.com/maps/api/js?v=3.exp&sensor=false&key=YOUR_KEY"></script>

Thanks

Dear thuygtn
I added the key already, and nothing shows.
Now added, can look.
Please, I need help.

Thanks

Nothing happens, does not see the map

Dear sir,

I checked your site google map are showing: prntscr.com/elflmv
please check it agian

Thanks

Dear anhqn,
I do not know, I do not have a map, everything is checked

Thanks