My understanding is that Social Security is A-OK, because it's for the elderly, who are usually venerated in Vietnamese culture and need to be cared for.
Taking "welfare" or other government aid is considered to be lazy.
In the mid-80s, I recall a rather large community of Vietnamese and Cambodians. They'd arrived there not knowing a lot of English, and yet, their kids excelled at school, winning an awful lot of honors and scholarships--which brought some resentment from the black community, which felt they were somehow being slighted. But these kids learned the language and STILL out-learned everyone else. Terrific folks.