According to Clause 1 Article 9 of Circular No. 219/2013/TT-BTC
, with regard to consultation, construction survey services provided for enterprises outside Vietnam, 0% VAT shall be only applied to the whole value of the contract if the foreign party does have permanent establishment in Vietnam and the services are consumed outside Vietnam.
If the foreign party has a permanent establishment in Vietnam (such as a representative office), 0% VAT shall be only applied to value of the service performed outside Vietnam.