Perhaps you should try some spelling variations:
"coder code _ complexity problem" » "coder code _ complex problem" (Expand search), "coder code _ completion problem" (Expand search), "coder code _ convexity problem" (Expand search), "code code _ complexity problem" (Expand search), "modern code _ complexity problem" (Expand search), "color code _ complexity problem" (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 code _ complexity problem\") OR (\"api python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder code _ complexity problem ) OR ( api python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder code _ complexity problem") OR ("api python python python programming"))*.