The Hunt Bill will only list the NM's (Notorious Monster) name and the name of the zone they spawn in, it doesn't mention the actual locations in that zone they may appear, resulting in a lot of random roaming needed, or more accurately, flying in the Clan Hunt's case, to actually find them.

Don't be afraid to shout out for help if you get stuck as someone is likely to have come across the monster you are looking for and will shout back the map co-ordinates if they do.