Perhaps you should try some spelling variations:
pheromone complexity » performance complexity (Expand search), pheromone component (Expand search), pheromone components (Expand search)
coded pheromone » biased pheromone (Expand search), heated pheromone (Expand search)
using pitons » using pion (Expand search), using pivots (Expand search), using mertons (Expand search)
ring using » drying using (Expand search), aging using (Expand search), scoring using (Expand search)

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "(( coded pheromone complexity control program ) OR ( ring using pitons python programming ))~".
• Adding a wildcard symbol may retrieve word variants: (( coded pheromone complexity control program ) OR ( ring using pitons python programming ))*.