Perhaps you should try some spelling variations:
"coder coder sampling model problem" » "coder under sampling model problem" (Expand search), "coder over sampling model problem" (Expand search), "coder core sampling model problem" (Expand search), "coder coder sampling modeling problem" (Expand search), "coder coder coupling model problem" (Expand search), "coder coder sampling mixed problem" (Expand search), "coder coder sampling model problems" (Expand search), "coder coder sampling moral problem" (Expand search), "coder coder sampling model probe" (Expand search), "coder decoder sampling model problem" (Expand search), "code code sampling model problem" (Expand search), "decoder codec sampling model 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 coder sampling model problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder sampling model problem\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder sampling model problem ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder sampling model problem") OR ("api python python python programming"))*.