The tpSpell action outputs the mapping of suggested misspellings to corrected spellings. We do not have an action to rewrite the input documents with the corrected term in place. Is this what you you would like? Then run the concept node on the corrected version?
This is something we can consider adding. For now you would need to do a tpParse/tpSpell action run and then modify the input documents yourself. Since the byte offset location of each word you want to change is specified in the output of tpSpell, you could make the change programmatically using this information. Once you make the change you can rerun your VTA diagram on the revised documents without spell checking. I hope that helps.
Russ