It appears that Smith County Sheriff and Carthage Police are using DMR which your scanner cannot decode. Smith County Fire and EMS also use DMR. You can only receive frequencies with a Mode of FMN. Try the FMN frequencies to see if they are still used. Someone in your area is in a better position as to what is active.
I was referring only to the list shown. Your scanner is also capable of P25 conventional frequencies as well as P25 Phase I trunked systems. It will also receive LTR and EDACS analog trunked systems and Motorola Type II trunked systems.