Dog chews are usually based on animal by-products and / or contain meat, which makes them unsuitable for herbivorous rabbits.
There are a few dog treats that are eg dried sweet potato or coconut - they should be OK. Check the packet. Anything with meat, meat derivatives or dairy (eg milk, eggs, cheese) should be avoided. Even some treats aimed at rabbits are not suitable as they contain dairy.
Hay is always good for rabbits. You can make your own 'chews' eg. by stuffing toilet rolls with hay. Willow toys and apple sticks are also good.