DOZ's algorithms roll out tasks every day. If a task matches your profile, you will be notified via email.
If you have not completed your profile correctly, there is a good chance you're only getting a few tasks. To make sure you are receiving new tasks, click on the top right corner of your Dashboard on "Profile". Make sure you add your skills and experience. It is the only way you will receive tasks!
Remember DOZ's algorithms are matching tasks according to your profile, so the more complete it is, the more tasks with better earning you will receive!