David Morin - Introduction to Classical Mechanics, with Problems and Solutions
Download at:
https://dl.dropbox.com/u/2477840/Introduction%20of%20Classical%20Mechanics%20_Chapter%201-6_%20Draft%20Versio.PDF
Vietnamese Version (Chapter 1 to 5).
Download at:
https://dl.dropbox.com/u/2477840/Chapter1-5.pdf