Perhaps you should try some spelling variations:
"coder estimation of string problem" » "model estimation of string problem" (Expand search), "power estimation of string problem" (Expand search), "color estimation of string problem" (Expand search), "coder estimation of sizing problem" (Expand search), "coder estimation of rostering problem" (Expand search), "coder estimation of sharing problems" (Expand search), "coder estimation of strong problem" (Expand search), "coder estimation of strains problem" (Expand search), "coder estimation of strain 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.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder estimation of string problem\") OR (\"api python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder estimation of string problem ) OR ( api python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder estimation of string problem") OR ("api python python python programming"))*.