If you are looking for a book or article that is not available in the university library or in other libraries you visit you can request to order it from another library.
It is an interlibrary loan service.
However, the interlibrary loan service is not free, but it is a paid service.
The advantage of interlibrary loan service is that it saves your time.
On the website of the library knihovna.tul.cz, in the section Science Support in the Interlibrary Loan Service section, you will find a form that you only need to fill out.
The financial terms of service are listed as well on the same page.
After sending the form, the librarian will arrange everything.
You will then borrow the required document in the main library or the library branch.