With the renewal of the Japan-Vietnam Patent Prosecution Highway Pilot Program (PPH) for three years starting April 1, 2019, the Vietnam National Intellectual Property Office has doubled the number of PPH applications it accepts per year from 100 to 200, but it has reached the maximum number of PPH applications for the period from October 1, 2021 to March 31, 2022, and has stopped accepting applications.
Japan Patent Office
https://www.jpo.go.jp/system/patent/shinsa/soki/pph/japan_vietnam_highway.html
Vietnam National Intellectual Property Office
https://ipvietnam.gov.vn/thong-bao/-/asset_publisher/vTLYJq8Ak7Gm/content/thong-bao-ve-tham-inh-nhanh-on-sang-che-pp-2