Perhaps you should try some spelling variations:
"coder sampling errors in problem" » "coder sampling error in problem" (Expand search), "coder sampling effort in problem" (Expand search), "coder spelling errors in problem" (Expand search), "under sampling errors in problem" (Expand search), "core sampling errors in problem" (Expand search), "over sampling 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 sampling errors in problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder sampling errors in problem\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder sampling errors in problem ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder sampling errors in problem") OR ("api python python python programming"))*.