Where can I get the user guide?

[KamiyaTomoaki]

I am using Creo Parametric 2.0 F000

Other than the help center, are there any other documents, such as PDFs, that show the basic operation and creation process?

[Chris3]

There is the learning connector: PTC Creo Video Tutorials

Live classes at PTC University: https://www.ptc.com/en/ptc-university

YouTube

Student How to Model Anything PDFs: http://apps.ptc.com/schools/How_to_model_almost_anything.zip 

[BenLoosli]

Try Amazon.com for some books on Creo.

Creo 2 is about 8 years old, so not much available anymore.