Make your thesis work plan and project plan carefully. These help you to understand what you are going to do and what kind of sources you are going to need in your thesis.
See the Savonia instructions for your thesis in Reppu.
You can find most of the theses of Universities of Applied Sciences on the Internet via Theseus. It's possible to limit your search for example to Savonia. Our theses are also in Savonia-Finna.
You can search theses of Finnish universities in Finna.fi (choose content type after your search). However, not all of them are catalogued to the database, for example theses of Aalto University. You can also use library catalogues of certain universities to find theses. Some of them are readable online.