You can upload your flight log here and some knowledgeable site members will examine the flight log and help you pinpoint the most probable spot to search . Things like speed of wind, wind direction, stick inputs , motor speeds , etc will be taken into account to help scale down the area to be searched. I have observed time and time again that this information proves invaluable to the search efforts.
You can also mount an external tracking device that will help. Popular tracking modules include the Trackimo.
Have you lost your drone or are you asking for general knowledge?