In the car, my friend told me that many Vietnamese worship the Sea Goddess--the Goddess Matsu to Taiwanese--because they rely so much on fishing for a living, and therefore safety at sea is a primary concern.
越南人打漁為生，希望能夠平安地在海上往返，都習慣供奉「天后」，即是台灣人所稱的「媽祖娘娘」。