Derstalking or Deerstalking: How To spell?
The word Derstalking is misspelled against Deerstalking, a noun meaning "The hunting of deer on foot, by stealing upon them unawares."
Deerstalking has double "ee" is mispronounced as "e"Remember double 'EE' in between the strings D & rstalking which should not be misspelled with single 'E'
Wrong Spelling:  D-e-rstalking  Correct Spelling:  D-ee-rstalking 
Find more wrongly spelled words of Deerstalking to spell it well.