Thereento or Thereinto: How To spell?

The word Thereento is misspelled against Thereinto, an adverb meaning "Into that or this, or into that place."

Word contains consecutive vowels 'EI' in between alphabets ther & nto is misspelled as 'EE'
Wrong Spelling:  ther-ee-nto 
Correct Spelling:  ther-ei-nto 
Find more incorrect spellings of Thereinto to spell right way.