Workshop on Geometry and related topics, Phu Tho, Vietnam (July 30, 2022)
https://maths.hpu2.edu.vn/thong-bao-ve-viec-to-chuc-hoi-thao-khoa-hoc-voi-chu-de--mot-so-van-de-chon-loc-trong-hinh-hoc.html 

Grad Student Seminar, NUS, Singapore (Apr 16, 2025) 

Teichmüller Theory and Flat Structures, Matrix, Creswick, Australia (Mar 16 - 28, 2025)
https://www.matrix-inst.org.au/events/teichmuller-theory-and-flat-structures 

Workshop on Dynamics and Related Topics, IMS, NUS, Singapore (Mar 04 - 06, 2025)
https://ims.nus.edu.sg/events/dynamicstopics 

Workshop on Geometry and Dynamics in Low Dimensions, IMVAST, Hanoi, Vietnam (Jan 06 - 10, 2025)
https://sites.google.com/view/gdldhanoi 

Scientific workshop for young researchers, Vinh Phuc, Vietnam (Sep 28 - 29, 2024)

IMVAST-OCAMI Joint Conference, Osaka Metropolitan University, Japan (May 16 - 19, 2024)
https://sites.google.com/view/imvast-ocami-jc 

Geometry and Topology Seminar, KIAS, South Korea (Mar 28, 2024)
https://www.kias.re.kr/kias/activities/seminars 

Workshop on Hyperbolic Geometry of Numbers, June E Huh Center for Mathematical Challenges, KIAS, South Korea (Dec 18 - 20, 2023)
https://sites.google.com/view/hygen2023 

JSPS-VAST Workshop, FPT University Quy Nhon, Vietnam (Sep 11-15, 2023)
https://sites.google.com/keio.jp/jv2021-2024/jv2023-workshop 

Mathematics workshop and related fields, Ha Tinh, Vietnam (Apr 18, 2023)

JSPS-VAST Bilateral Joint Research Project Workshop, Vietnam (Dec 19-20, 2022)
https://sites.google.com/keio.jp/jv2021-2024/jv2022-workshop-in-hanoi 

Algebra and Number Theory Seminar, IMVAST, Vietnam (Nov 16, 2022)

Scientific conference on Geometry, Analysis & Applications, Phu Tho, Vietnam (Oct 14-16, 2022)

Topology and Geometry Seminar, National University of Singapore, Singapore (Sep 01, 2022)
https://www.math.nus.edu.sg/category/events/colloquia-seminars/page/73/ 

Scientific workshop for young researchers, Vinh Phuc, Vietnam (Aug 27-28, 2022)

Japan-Vietnam Singularity Seminar, Vietnam-Japan (Online, April 07, 2022)
https://sites.google.com/keio.jp/jv2021-2024/jv-singularity-seminar 

Mostly Teichmuller Spaces (MTS) Seminar, Queens College, USA (Online, Mar 31, 2022)
https://dragomirsaric.com/mts-seminar 

Ph.D. Defense, Geometry Winter Workshop, Luxembourg (Jan 26, 2022)
https://math.uni.lu/geometry/winter2022/index.html 

Topology and Geometry Seminar,  Institute of Mathematics, Vietnam (Online, Nov 11, 2021)

Topology and Geometry Seminar,  Vietnam National University Ho Chi Minh City - University of Science, Vietnam (Online, Oct 29, 2021)

Ph.D. Away days, Luxembourg  (Online, Oct 23, 2020)

Ph.D. Seminar, Luxembourg (Online, May 27, 2020)
https://math.uni.lu/docsem/talks/2020/05/27/doan.html 

CUSO School on Geometry and Dynamics on Hyperbolic Surfaces, Les Diablerets, Switzerland (Aug 26-31, 2018)
http://members.unine.ch/felix.schlenk/CUSO2018LesDiablerets