Perhaps you should try some spelling variations:
"coder coder controller modeling problem" » "coder coder controlled cooling problem" (Expand search), "coder coder controlled rolling problem" (Expand search), "coder mode controller modeling problem" (Expand search), "coder order controller modeling problem" (Expand search), "coder power controller modeling problem" (Expand search), "coder coder controller modeling problems" (Expand search), "coder coder controller modelling problem" (Expand search), "coder coder controller modelling problems" (Expand search), "coder decoder controller modeling problem" (Expand search), "code code controller modeling problem" (Expand search), "decoder codec controller modeling 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 controller modeling problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder controller modeling problem\") OR (\"api python python python programming\"))*".
• Removing quotes may allow a broader search: (( coder coder controller modeling problem ) OR ( api python python python programming ))*.