For fiction from the perspective of North Vietnamese, check out this post: Let’s Talk Books (8).
I don’t read much fiction about the war though, I’ll admit. The ones I have read are the big names, like The Things They Carried. I wouldn’t feel comfortable actually “recommending” books or even movies if I haven’t read or seen them myself.
That being said I do like checking out Goodreads lists. This is one on Popular Vietnam War Fiction.
I was also asked about movies several years ago and followers replied with a lot of movies (and TV shows) they liked. Check it out.