I believe in in none of those cases does nei or no'a "work". I don't consider that sei-se'u constructions can "see" the sentence they are talking about it. It would make about as much sense as:lo mamta cusku lu vo'a nitcu lo nu klama lo zarci li'uand claiming that "vo'a" refers to "lo mamta" (contrariwise, "lo mamta cusku lo se du'u vo'a nitcu lo nu klama lo zarci" does work)--gejyspa