Has anybody any suggestion especially any aussie people my year old aussie when we are out over the country park evvery morning he runs of when he see another dog and I have tried food, toys, running the other way leaving a long line on him and dispite that he will not come back and if the other dog run off he goes as well.

you need to train a good recall when there are no distractions using really good treats. that way you can call him if you see a dog brfore he runs off and then keep hold of him

Hi,

I'm afraid you need to go back to basics and start training again at home.
practise using a word when he comes to you, i use the word 'come'. i practise all the time to re-enforce the word ie i call my dogs in the house and garden and as they move towards me i say the word, then they get a treat for it. i always carry treats in my pocket so i can practise this but don't always give a treat once they learn the word else they'll only come for food. Never get cross else they will ignore you. say the word in a happy voice.
When i let my dogs off the lead when out i give them a treat first so they know what i've got for them when i call them back.
You need to make coming back to you worth while and fun ie a treat or favourite toy which they only get when they are off the lead so their not bored of the same things.
Maybe worth seeing if you've got a training course near you, then you can practise with other dogs and people around in a safe place.
i wouldn't let my dogs off the lead until their recall was good, go out with a long lead and practise calling him back even if he's only a few feet in front of you then reward.
There really is no quick fix you just need to practise alot and not move forward until your confident your dog is under control.
Good luck i'm sure your get their in the end just take your time with training.    

Hi bear, try using a whistle--you'd have to work really hard to make a whistle sound cross and they can be heard a lot further than your voice with minimum effort :-)

my O.H had a rescue lurcher exactly the same we used a long line and let her run with it on, when we wanted her back we would call, if she didnt came first time we would get the line pull her in then reward her. When we thought she had learnt the recall well enough we took it off her but she realised that was our power at first and being a sighthound wouldnt come back if there was something, anything moving in the distance so its lots and lots of reward based training and a long line if you want that reassurance