That a question gets no answer does not necessarily mean it is "too hard". It could mean that, but it could also mean that no one knowing the answer found the question interesting enough to spend the time writing up the answer or that no one knowing the answer saw the question (your question has 78 view, which is not that many). Or the people knowing the answer didn't have time to write an answer and then later forgot to come back. You often can't know the reason a question stays unanswered.
If you want to migitate some of the possibilities I said, then the "standard" way to increase the visibility of a question is to place a bounty. This additionally offers additional incentive in the form of reputation points to the people knowing the answer to actually spend the time writing it down.
Furthermore, you could edit your question to make it more easily answerable and more easily readable. The longer a question, the better your writing must be so that people actually read through it instead of finding something faster to read (it's debatable whether this behaviour is a good thing, but that's how it is). Ask yourself: Do you explain why this question is interesting at the beginning to get reader interested and read on? Are all those pictures really necessary? If "the question is short", then why is the question so long?
If you do edit your question, then that will put it on the top of the "active" questions list again. Please do not use this feature by making trivial edits (e.g. adding whitespace, correcting one typo every ten minutes, etc...).
Also, posts shouldn't look like revision histories. A new reader doesn't care why you added the second part historically. They care what it has to do with the question, and how it's supposed to make answering it easier.