Hi😊 For your info:

Ho Chi Min and Hanoi Thai Embassy, Vietnam DO NOT give 1 year multy Non-B, if you are CONDUCTING your business + holding WP.

1 year multy for BUSINESS visas is possible only for those NOT working, but only conducting business.

3 months single is the only option for WP holders. BUT! If you have 4 imployed Thais in your company, paying tax, you can turn this 3 months in one year multy in your local Immigration office. Those with only 2 workers taxed can not prolong it.

I do not know about any other visa types, but above info is today fresh 😢

The stuff in the Embassy told, now Penang is the only place to get 1 year multi for conductors+WP. If you have RECENT experience in other countries or Kuala Lumpur, please let us know 🙏😊