With fellow Montpelliérains Louis Picamoles and Julien Tomas, they are part of a quartet of home-grown talents embodying the success of the Montpellier Hérault Rugby Club's attempt at "shaking up the old order" of French rugby in the Septimanie terroir which had always been historical rival Béziers's stronghold.

Trinh-Duc's drop goal helped France beat England 19–12 at Eden Park[4] in quarter-final in 2011 Rugby World Cup.

He set in motion the move that led to Thierry Dusautoir's try in the 47th minute and converted the try to make the score 8–7.

[5] On 19 March 2021, Trinh Duc left Racing 92 for Top 14 rivals Bordeaux from the 2021–22 season.

Nhien later married an Italian woman; Trinh-Duc's father, Philippe, being the result of this union.