Perhaps you should try some spelling variations:
"coder estimation python null subject" » "coder estimation portion null subject" (Expand search), "coder estimation method null subject" (Expand search), "coder animation python null subject" (Expand search), "model estimation python null subject" (Expand search), "power estimation python null subject" (Expand search), "color estimation python null subject" (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 python null subject\") OR (\"api python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder estimation python null subject ) OR ( api python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder estimation python null subject") OR ("api python python python programming"))*.