Perhaps you should try some spelling variations:
"coder estimation python teaching subject" » "coder estimation portion teaching subject" (Expand search), "coder estimation method teaching subject" (Expand search), "coder animation python teaching subject" (Expand search), "model estimation python teaching subject" (Expand search), "power estimation python teaching subject" (Expand search), "color estimation python teaching subject" (Expand search), "coder estimation action teaching subject" (Expand search), "coder estimation motion teaching subject" (Expand search), "coder estimation fashion teaching 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.

• Performing a fuzzy search may retrieve terms with similar spellings: (("coder estimation python teaching subject") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder estimation python teaching subject\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder estimation python teaching subject ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder estimation python teaching subject") OR ("api python python python programming"))*.