You can download software testing tutorial from the below links. I have uploaded some study material on rapid share, so you can download it. You should know the below topics, if you are new in software testing or if you want to make your career in software testing. I will keep on uploading new data. However, if you require tutorials on a particular topic, so you may leave comment. I will happy to upload the tutorial for you.
Basics of Software Testing.
Software Testing Concepts
Principles of Software Testing
Type of Software Testing
Test Process in Software Testing
Testing Methodology Training Manual
Risk Management in Software Testing
Manual Testing Questions With Answers
Glossary of Software Testing and Quality Assurance
