Perhaps you should try some spelling variations:
"coder estimation from and problem" » "model estimation from and problem" (Expand search), "power estimation from and problem" (Expand search), "color estimation from and problem" (Expand search), "coder estimation of and problem" (Expand search), "coder estimation from an 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 from and problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder estimation from and problem\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder estimation from and problem ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder estimation from and problem") OR ("api python python python programming"))*.