Treeng or Treeing: How To spell?

The word Treeng is misspelled against Treeing, which is present continuous of "Tree"

Word contains consecutive vowels 'EI' in between alphabets tre & ng is misspelled as 'E' as letter 'I' is phonetically ignored
Wrong Spelling:  tre-e-ng 
Correct Spelling:  tre-ei-ng 
Explore spell check of Treeing to spell without errors.