Perhaps you should try some spelling variations:
"coder codemi source estimation problem" » "coder codemi source restoration problem" (Expand search), "coder codemi source optimization problem" (Expand search), "coder codemi source education problem" (Expand search), "coder comme source estimation problem" (Expand search), "code code source estimation 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 codemi source estimation problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder codemi source estimation problem\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder codemi source estimation problem ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder codemi source estimation problem") OR ("api python python python programming"))*.