How God Works?
Its impossible to decode how His intervention works. Sometimes all you need is to make pray and its there, sometimes a sincere thought should suffice and sometimes you do everything in your control and still there is nothing. The bottom line is always have a good positive assumption of Allah almighty and trust that He is all knowing, all powerful, if He decides that something can benefit someone, nothing can stop Him and if He decides something can hurt someone, no one can do anything about that.