If you are looking for theses written by San Jose State University students, search in OneSearch on the home page of the library website. Theses are listed under author, title and subject. Older theses (those written before 2009) will be available in print but newer theses will only be available online in ScholarWorks, the library's institutional repository.
If you are looking for theses and dissertations written by students outside of San Jose State, use the ProQuest Dissertations and Theses database. You can do a basic keyword search or search for a specific title or author. Note: Not everything in this database is available in full text online. If you find a dissertation or thesis that is not available in full text, request it through Interlibrary Loan.