Perhaps you should try some spelling variations:
"coder string theory complexity problem" » "coder string theory complex problem" (Expand search), "coder string theory completion problem" (Expand search), "coder string theory convexity problem" (Expand search), "coder string the complexity problem" (Expand search), "coder nursing theory complexity problem" (Expand search), "cordel string theory complexity problem" (Expand search), "closed string theory complexity problem" (Expand search), "modelo string theory 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 string theory complexity problem\") OR (\"api python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder string theory complexity problem ) OR ( api python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder string theory complexity problem") OR ("api python python python programming"))*.