"Als de buren klagen, kan je ze naar mij sturen."
Translation:If the neighbors complain, you can send them to me.
Good question! Both can be used to mean "to send," but verzenden is more often used to send larger items/goods by (snail) mail, ship or airplane. Sturen is generally used for sending small packages/letters/cards by mail or sending e-mail/text messages, for sending people to or from a specific location (e.g. zijn moeder stuurde hem naar school = his mother sent him to school; hij werd van school gestuurd = he was expelled from school). Sturen is also used "to steer" a vehicle.