The "new" version adds the word "sợi dây" (thread/string), which visually references the marigold bridge in the film. This level of detail is what the search term implies.
: Disney and Pixar have officially started production on . coco cuoc hoi ngo dieu ky vietsub new
The Vietnamese subbing community (known as team Vietsub ) is highly competitive and passionate. When a "New" version drops, it usually means: The "new" version adds the word "sợi dây"