Copy and paste one of these phrases into the search box on the library homepage, depending on whether you want arts (ma), science (ms), or music theses (mm):
"thesis (m.a.)" west chester university
-or-
"thesis (m.s.)" west chester university
-or-
"thesis (m.m.)" west chester university
Your results should look like this.
You can add the department or subject area at the end of that phrase to narrow down your search.