Perhaps you should try some spelling variations:
pheromone complexity » performance complexity (Expand search), pheromone component (Expand search), pheromone components (Expand search)
modes pheromone » male pheromone (Expand search), mori pheromone (Expand search), moth pheromone (Expand search)
mertons python » pitons python (Expand search)
using mertons » using methods (Expand search)
using using » housing using (Expand search), aging using (Expand search), ring using (Expand search)

You may be able to get more results by adjusting your search query.

• Removing quotes may allow a broader search: (( modes pheromone complexity control program ) OR ( using using mertons python programming ))~.