Wow; Hennepin County Library has Doc Smith’s Lensman series (mostly in the Old Earth Books facsimile edition), but no Skylark or anything…except…ah, there it is, says in the listing what the English title is:
CuoÌ£Ì‚c saÌ†n Ä‘uoÌ‰Ì‚i trong khoÌ‚ng gian by Smith, E. E. (1986?)
Vietnamese Adult Nonfiction Book
Which is apparently a Vietnamese edition of The Skylark of Space!