Perhaps you should try some spelling variations:
effect programming » efficient programming (Expand search), subject programming (Expand search), element programming (Expand search)
sampling effect » sampling effort (Expand search), sampling efforts (Expand search), coupling effect (Expand search)
code sampling » core sampling (Expand search), node sampling (Expand search), one sampling (Expand search)
python python » pythons python (Expand search), piton python (Expand search), pitons python (Expand search)
code code » code cdc (Expand search)

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

• Removing quotes may allow a broader search: (( code code sampling effect programming ) OR ( _ python python python programming )).