Perhaps you should try some spelling variations:
efficiency coding » efficiency cooling (Expand search), efficient coding (Expand search), efficiency according (Expand search)
cpp efficiency » cpap efficiency (Expand search), crop efficiency (Expand search), p efficiency (Expand search)
python python » pythons python (Expand search), piton python (Expand search), pitons python (Expand search)
coder code » code code (Expand search), modern code (Expand search), color code (Expand search)
api python » rpa python (Expand search)
code cpp » code cpc (Expand search), code ctn (Expand search), code cdc (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 code cpp efficiency coding ) OR ( api python python python programming ))~".
• Adding a wildcard symbol may retrieve word variants: (( coder code cpp efficiency coding ) OR ( api python python python programming ))*.