Yes -- if you want to expand the contraction "Can't you find anything?", it becomes "Can you not find anything?".
The contraction here acts differently from "verb + not" in the position in the sentence.
Similarly, "Didn't you see him?" is the same as "Did you not see him?" rather than "*Did not you see him?", and "Isn't that right?" is the same as "Is that not right?" rather than "*Is not that right?"
(* marks an erroneous sentence)