We've created this Forum Thread with some workarounds and advice to assist you in publishing you ebook.
Amazon key search tags
Just spoke to lulu support. I was told that they aren't given the option to add key search tags to our ebooks when they are listed on Amazon. So if your book isn't being found , this is probably why. Your best bet is what I do in all of my books, put the key words in the title or subtitle. This seems to have helped my last three ebooks. Print books on the other hand are better as we can contact Amazon and add whatever phrases we want. Plus if you have a print and kindle version and someone does find the print during a search your kindle will be offered next to it so it's another way to be found. Make a print too. Just thought you'd like to know.
Reflections of a Christian Kungfu Master
Daddy Who's that Man? An Easter Story