I think you are having the problem because you are doing a "search" for casino chips. You will only get items containg those words in the title and/or description. You need to look in the casino chip category, currently 7711 items. To do this go to ebay's home page then click on
Collectibles
then Coin-Op Banks and Casino
then Casino
then Chips.
You will then get all the items listed in that category.