Perhaps you should try some spelling variations:
"coder coding _ convergence complexity" » "coder coding _ competence complexity" (Expand search), "coder coding _ convergence mobility" (Expand search), "coder coding _ convergencia completa" (Expand search), "modern coding _ convergence complexity" (Expand search), "color coding _ convergence complexity" (Expand search), "odor coding _ convergence complexity" (Expand search)
"api pitons python python programming" » "api pitons pythons python programming" (Expand search), "api pitons piton python programming" (Expand search), "api pitons pytm python programming" (Expand search), "api citons python python programming" (Expand search), "api pitoni python python programming" (Expand search), "api pitoes 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 _ convergence complexity\") OR (\"api pitons python python programming\"))~".
• Removing quotes may allow a broader search: (( coder coding _ convergence complexity ) OR ( api pitons python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder coding _ convergence complexity") OR ("api pitons python python programming"))*.