Perhaps you should try some spelling variations:
"coder model complexity cost problem" » "coder code complexity cost problem" (Expand search), "coder social complexity cost problem" (Expand search), "coder and complexity cost problem" (Expand search), "coder model complexity costs problem" (Expand search), "coder model complexity across problem" (Expand search), "coder model complexity about problem" (Expand search), "coder model complexity cut problem" (Expand search), "coder model complexity forest problem" (Expand search), "cover model complexity cost problem" (Expand search), "decoder model complexity cost problem" (Expand search), "copper model complexity cost 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.

• Performing a fuzzy search may retrieve terms with similar spellings: (("coder model complexity cost problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder model complexity cost problem\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder model complexity cost problem ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder model complexity cost problem") OR ("api python python python programming"))*.