Translation of krummholz in German

In addition, two woman were singing songs taken from Vietnamese theater. Again, I don't exactly recall what it was all about, but it seems boring and unimportant from today's point of view.
I understand that you use the article 'die' when talking about a feminine object, das when the subject is neutral, and der when talking about a masculine object. But how can you remember all these?
Sorry but I hadn't have enough time in the last two weeks to respond to your email and to your interesting offer. I really need to think about it a little longer, and I am sure you'd understand.