Yes physiotherapy can be a great help to treat chronic bronchitis , but not that alone . You need to also consult a pulomonologist and get the necessary medical treatment done
Next Steps
You can visit a nearby physiotherapist for proper evaluation and can learn all the breathing exercises which needs to be done on a regular basis , preferbly 2-3 times a day .
Health Tips
Try to avoid anything cold and take steam to loosen the mucus.