Perhaps you should try some spelling variations:
preference function » preference formation (Expand search), deterrence function (Expand search)
using preference » using reference (Expand search), laying preference (Expand search), mating preference (Expand search)
python python » pythons python (Expand search), piton python (Expand search), pitons python (Expand search)
coder cover » cover cover (Expand search), codes over (Expand search), under cover (Expand search)
cover using » recovery using (Expand search), cancer using (Expand search), center using (Expand search)
in python » _ python (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: "(( coder cover using preference function ) OR ( in python python python programming ))~".
• Adding a wildcard symbol may retrieve word variants: (( coder cover using preference function ) OR ( in python python python programming ))*.