woo-viet/assets/provinces.css

.woocommerce-billing-fields__field-wrapper,
.woocommerce-shipping-fields__field-wrapper {
    display: flex;
    flex-wrap: wrap;
}

#billing_first_name_field,
#shipping_first_name_field {
    order: 1;
}

#billing_last_name_field,
#shipping_last_name_field {
    order: 2;
}

#billing_company_field,
#shipping_company_field {
    order: 3;
}

#billing_country_field,
#shipping_country_field {
    order: 4;
}

#billing_state_field,
#shipping_state_field {
    order: 5;
}

#billing_city_field,
#shipping_city_field {
    order: 6;
}

#billing_address_1_field,
#shipping_address_1_field {
    order: 7;
}

#billing_address_2_field,
#shipping_address_2_field {
    order: 8;
}

#billing_postcode_field,
#shipping_postcode_field {
    order: 9;
}

#billing_phone_field,
#shipping_phone_field {
    order: 10;
}

#billing_email_field,
#shipping_email_field {
    order: 11;
}