Sadly, there isn't a lot you can do. If you have the chip you can use a little of epoxy glue to put it back into place. Most likely something will catch it again and take it back up. I have seen some fillers on the market that try to match the color of the floor. The wood grain will not be there but it might not be as much of an eye sore. The best recommendation is to put a rug over it.
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There isn't a lot you can do, other then cover it. Pergo and other manufactures do make putty that is colored like their floors. Usually these are used to cover nail holes in trim. You could use that, but it will not have the wood grain the rest of the floor has.
Unless the floor is buckling from an expansion problem then the laminate just follows the floor below it. The time to fix it is before the laminate is installed.