Perhaps you should try some spelling variations:
"coder coding _ variability complexity" » "coder coding _ variability coupling" (Expand search), "modern coding _ variability complexity" (Expand search), "color coding _ variability complexity" (Expand search), "odor coding _ variability complexity" (Expand search)
"api python python python programming" » "api pythons python python programming" (Expand search), "api piton python python programming" (Expand search), "api pitons python python programming" (Expand search), "rpa python python python programming" (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 coding _ variability complexity\") OR (\"api python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder coding _ variability complexity ) OR ( api python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder coding _ variability complexity") OR ("api python python python programming"))*.