Actually, it doesn't mean anything 'cause lei is the femminine of you in Italian :) "e" is and,le ka nothing :D The song is a part Hawaiian song The word lei is flower garland. In this case though the phrase is sort of like tra la la in other songs in Engish.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.