Perhaps you should try some spelling variations:
"coder estimation errors in problem" » "coder estimation methods in problem" (Expand search), "coder medication errors in problem" (Expand search), "coder estimation from in problem" (Expand search), "model estimation errors in problem" (Expand search), "power estimation errors in problem" (Expand search), "color estimation errors in 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 estimation errors in problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder estimation errors in problem\") OR (\"api python python python programming\"))*".
• Removing quotes may allow a broader search: (( coder estimation errors in problem ) OR ( api python python python programming ))*.