Just finishing my first year's lease. I've been visiting Thailand for a couple decades but just started doing the leasing thing so dealing with agents is just new in the last year or so. Looking for a new lease and it seems like each real estate office only offers their own limited selection of properties - is this true?

I'm used to how things operate in the West where all agents have access to all available properties for rent or for sale. Is it really true that you can go to different agencies and be offered different available properties?