Hi Methsiri,
It is totally fine and a part of the process. With more practice you will start to recognize job posts with higher response chances on your application. It is critical to enhance your proposals texts again and again (you can create a general template of your proposal and customize it for each new application). You also can show in the text of the proposal that you have ideas regarding the job post and have already started to think about the best way to complete the project.
When you start it is normal if you receive one reply for around 20 or even more proposals. You need to bid more every day, but do not forget to choose jobs more carefully, enhance your proposals texts, profile, try different strategies and analyze the results.
