Dear Vuong,
Sorry for the delay in replying.
You need go to RealEstateManager : Settings - Administrator Settings - Price Options - Currency and add VND in this way:
VND=1;
If you want to use other currencies, enter the values as: USD = 1; EUR = 3.15; or USD=; EUR=; Available for paypal currencies: AUD, CAD, CZK, DKK, EUR, HKD, HUF, JPY, NOK, NZD, PLN, SGD, SEK, CHF, USD ,RUB
Before add VND you need in Payment settings put for Show buy for booking: and Show buy for sale: - NO, because this currency not supported by Paypal
Sincerely Yours
Taras
OrdaSoft team