A villager's skills are not the same thing as Village Tech. Village Tech is purchased with the tech points that your villagers earn at the research table. If you click on the Tech button, you will see the tech screen displayed. There are 6 areas of technology, each one providing a different benefit to your tribe. In Village Sim, the technology that you need for better food sources is called Harvesting. If you click on the "?" for each tech, you can get a description of what each one does.
