Since you lived in Vietnam in the early 1970s, do you happen to know Mr. Truong Duy Nhat and Ly Long Than, they were the Chinese owners of the Vinatexco textile factory near TSN Airport in Saigon ?
It is about a lady recalled her happy days with her boyfriend, they knew each other from small kid to grown up adult. Her boyfriend left her eventually for another lady, she was sad but hoped to continue the happy times as before with him in her dreams. Anyway this is only a song, not a true story.
Thanks for all information, it means a lot to me. I love the version of a group called Jigsaws from Malaysia , they are doing it in instrumental way. Once again thanks a lot.