Hi Robert,
The short answer is no--Canvas doesn't provide an out-of-the-box way for you to hide content from a student taking a quiz. Even if it did, depending on your school's settings, students could simply download the entire course as a eBook and reference it that way.
Depending on your school, you may have proctoring tools available, such as Proctorio or Respondus LockDown Browser. These tools can help prevent students from opening up course materials during a quiz in addition to preventing them from searching for materials on other sites, but they come with privacy and legal implications that you may need to consider, depending on your school and legal jurisdiction. Do note, however, that your school may require special training for these tools and so they may not be enabled in courses by default (mine certainly does). Moreover, these tools aren't a silver bullet to prevent wandering eyes or more intentional academic dishonesty.
If these tools aren't available to you, or if the privacy/legal implications outweigh their value, the most reliable option would be to redesign your quizzes to assume open-note and open-book. Generally, this means moving away from simple reading comprehension/memorization questions (e.g., what are the five parts of a speech introduction) to more application/analysis questions (Label the five parts of this speech's introduction: ...). For ideas about the kinds of questions test these higher levels of thinking, look into using Bloom's Taxonomy verbs as starting points. Alternatively, though this does definitely require more instructional design and grading work on your end, you can migrate your quizzes to using more authentic assessments such as portfolios, essays, and presentations.
I hope this helps!