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