Perhaps you should try some spelling variations:
"coder model errors theory problem" » "coder model errors theory problems" (Expand search), "coder model errors the problem" (Expand search), "coder model errors theory program" (Expand search), "coder model error theory problem" (Expand search), "coder models errors theory problem" (Expand search), "coder del error theory problem" (Expand search), "cover model errors theory problem" (Expand search), "decoder model errors theory problem" (Expand search), "copper model errors theory 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 model errors theory problem\") OR (\"api python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder model errors theory problem ) OR ( api python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder model errors theory problem") OR ("api python python python programming"))*.