If you want to do a broad search for articles on document design from any journal, you can use Primo.
If you want, you can refine your results to Peer-reviewed Journals and Articles:
If you want to search for articles from the journals your professor recommended, below are links to Oregon Tech Library's online subscriptions these journals. After clicking on one of the journals below, you can search inside the journal or use one of the links in the View Online section to browse the journal: