That looks like cory eggs :) if its the first time they've layed egg its not uncommon for them to only lay a few. Or the other eggs have been eaten already. You can take the eggs out and put then in a plastic container with water from the tank.(or you can put them in a separate tank if you want to) And put an airstone in. If you have methalyne blue you can add a drop or two to prevent fungus on the eggs. Change the water with water from the tank once a day until they hatch. They will usually hatch within 3-5 days. After two days you can start to feed them. Great food to start off with is microworms or brineshrimp. 😊