A family of Microsoft word processing software products for creating web, email, and print documents.
Hello,
If the files convert to PDF just fine, the actual documents are definitely intact and the Word app is just bugging out when trying to display them on your phone screen.
Try the easiest fix first which is dumping the app cache. Head into your Samsung settings, go to the apps menu, scroll down until you find Word, tap on storage, and hit the clear cache button. Force close the Word app, launch it again, and check if your pages still show up blank.
Let me know how that goes.