Start with short, fast panting for about 30 seconds and then do slower medium panting for another 30 seconds. Finish with 30 seconds of low, deep panting. Changing the depth of your breaths and the speed of panting will give you more control over your breathing. You should feel air moving deeply through your lungs when you do the deep panting. Learn to take deep breaths before speaking or singing so you don't run out of air in the middle of a line. Extend your arm and hold out your index finger. Take a deep breath and imagine your finger is a candle that you need to blow out 5 times. Release the breath in 5 bursts so they're equal in length and power. Doing this exercise will give energy to your breaths. This can prevent your voice from sounding flat or boring as you speak or sing. You'll damage your voice over time if you frequently speak or sing with vocal fry. Instead of making a low, creaking or rough sound based in your throat, practice bringing the sound from the front of your mouth. Take a full deep breath, bring your lips together and blow the air out of your mouth so your lips vibrate quickly or trill.  Trill through your entire range and play around with the sounds you make. If you have trouble trilling, try humming instead. This will also move the sound from your throat to your mouth. Stand up and bring your shoulders back with your feet apart. Use a deep voice with a full breath to say or speak "Maaaa, mayyyyy, meeee, mowwww, mooo." This will open your voice and help you relax. You should feel the muscles in your abdomen tighten as you sing these words. Most people are familiar with practicing scales that ascend and descend along with a piano. Start with a major scale in the key of C and sing solfege notes such as "do, re, mi, fa, so, la, ti, do," while ascending the pitches. Then decline back down to the pitch "do." Solfege scales will help you train your ear to hear and adjust your pitch. If you can, work with a professional voice instructor to make a program designed specifically for you. You...

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Write a summary of the previous text in Vietnamese:
Thay đổi tốc độ thở để hình thành kỹ năng điều tiết làn hơi. Thực hành thổi một hơi đủ mạnh. Rung môi để ngăn việc lạm dụng giọng siêu trầm. Phát âm nguyên âm trước khi sử dụng giọng. Tập xướng âm để cải thiện cao độ. Phát triển phương pháp khởi động giọng đơn giản.