I have a solved it...
You must go to:
administrator\components\com_virtuemart\helpers\currencydisplay.php
line 341
There is this text:
$res = number_format
above this text you must insert this code:
$this->_thousands = str_replace('&', ' ', $this->_thousands);
Final work look this:
$this->_thousands = str_replace('&', ' ', $this->_thousands);
$res = number_format((float)$nb,(int)$nbDecimal,$this->_decimal,$this->_thousands);
After that you must go to administrator:
Virtuemart -> Configuration -> Currencies -> "Select Currency" -> Thousands Separator = &
After that, will be Thousands Separator "space".
If you do not understand write me.