i have 8 map pieces,but it wont show the way neither to Phexcare, neither from Phexcare to orc cave,i dont know how to upload screenshot

So... did your party went along the river to phexcaer, nothing happened? The map describes the way, your party will search for it enroute, at 8 pieces they usually will find something. It's not like something will pop up on map immediately.