| Circular No. 20/2014/TT-BCT dated June 25, 2014 of the Ministry of Industry and Trade on the implementation of rules of origin in the agreement establishing Asean-Korea trade area | Circular | Ministry of Industry and Trade | Ministry of Industry and Trade | |
| Circular No. 20/2015/TT-BTTTT dated July 21,2015 promulgating the National technical regulation on IPv6 Customer Edge Routers. | Circular | Ministry of Information and Communication | Ministry of Information and Communication | |
| Circular No. 201/2013/TT-BTC Circular on application of advance pricing agreements to tax management | Circular | Ministry of Finance | Ministry of Finance | |
| Circular No. 21/2010/TT-BYT dated May 20,2010 promulgating the National Technical Regulation on Food additives - Anticaking agents. | Circular | Ministry of Health | Ministry of Health | |
| Circular No. 21/2014/TT-BCT dated June 25th 2014, amending to product specific rules enclosed with Circular No. 36/2010/TT-BCT on the implementation of amended rule on procedures for issuance and inspection of origin and the product specific rules .... | Circular | Ministry of Industry and Trade | Ministry of Industry and Trade | |
| Circular No. 21/2014/TT-BTTTT dated December 16, 2014 promulgating the National Technicala Regulation on General Electromagnetic Compatibility for Radio Communications Equipment. | Circular | Ministry of Information and Communication | Ministry of Information and Communication | |
| Circular No. 21/2015/TT-BNNPTNT dated June 8, 2015, pesticide product administration | Circular | Ministry of Agriculture and Rural Development | Ministry of Agriculture and Rural Development | |
| Circular No. 22/2010/TT-BYT dated May 20,2010 promulgating the National Technical Regulation on Food Additive- Colour retention agent. | Circular | Ministry of Health | Ministry of Health | |
| Circular No. 22/2011/TT-BKHCN of September 22, 2011, defining the quality management for wire and cable insulated with polyvinyl chloride with rated voltage up to and equal 450/750V | Circular | Ministry of Science and Technology | Ministry of Science and Technology | |
| Circular No. 22/2013/TT-BYT dated August 09, 2013 of the Ministry of Health guiding on continuous training for health officers | Circular | Ministry of Health | Ministry of Health | |
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