"The thief does not want to buy the shoes."
Translation:Fur calceos emere non vult.
I believe your response is correct. It's just that there are so many combinations that are correct in Latin, that Duolingo is bound to miss a few (and in some cases, a lot).
If you know for sure that your translation is correct (and without typos or any other mistakes), please submit it as a correct answer. That way you'll be improving Duolingo for yourself, the moderators, and all of the users.
I think you should have taken my answer. Fur emere calceos non vult. I tried to do this as a report but it switched me to discussion. I think there are some preferred word orders in Latin but generally the most important words come at the beginning of the sentence.
Once again, word order is a bone of contention.
As I commented on a previous question on word order, I wish this info would be included in the "Tips & Notes" for the lesson where a construction first appears. It would help the learner develop good habits in constructing sentences.