Searchable String in Storyline Quizzes

In designing written responses into entry boxes that are lengthier paragraphs, there are going to be related words and synonyms that don't necessarily align with every answer I design to match even if I fill out multiple answers as there are so many possibilities.  Can I turn off the marking scheme so that no answer displays as wrong and give grades on partial keywords only, or alternatively set it to not grade at all but work?