Perhaps you should try some spelling variations:
"coder estimation from string problem" » "model estimation from string problem" (Expand search), "power estimation from string problem" (Expand search), "color estimation from string problem" (Expand search), "coder estimation of string problem" (Expand search), "coder estimation from sizing problem" (Expand search), "coder estimation from rostering problem" (Expand search), "coder estimation from sharing problems" (Expand search), "coder estimation from studying problem" (Expand search), "coder estimation from shading 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 string problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder estimation from string problem\") OR (\"api python python python programming\"))*".
• Removing quotes may allow a broader search: (( coder estimation from string problem ) OR ( api python python python programming ))*.