Then they are probably not good enough. Just skip the bids.
Good sellers are always careful on what they do. If they are not capable of understanding the requirements, I doubt if they are capable of fulfilling your actual tasks.
There are several times I selected new sellers due to their professional response and my experience so far are good. Professional response = reading all my requirements + good portfolio + good English.
Alternatively you can browse your desired categories and reach some potential sellers. Generally Top rated and Level 2 sellers are veteran and they often do really good job. New sellers with genuine/good portfolio and good/genuine gig description have good potentials too. Just contact and see how they response, you can pretty much judge their skills through communication.
Have a great weekend!