I did my Masters (by Research) from a premier institute in India. I had taken 6 courses and the rest of the time was dedicated to research. All the research and collaboration was done only with my advisor.
Now, almost all the universities ask for 3 recommendation letters for PhD applications. But I have only worked with my advisor and published a paper too. So my advisor would be able to write me a good recommendation letter based on his experience with me.
How do I manage to get the other two recommendation letters? I have done only courses with other faculties and no small projects. I am aware that based on just courses and grades, these professors might not be able to write good recommendation letters.