Perhaps you should try some spelling variations:
"coder coder polar research problem" » "coder coder polar research problems" (Expand search), "coder coder polar research program" (Expand search), "coder coder polar research programs" (Expand search), "coder coder bipolar research problem" (Expand search), "coder coder power research problem" (Expand search), "coder coder scholar research problem" (Expand search), "coder decoder polar research problem" (Expand search), "code code polar research problem" (Expand search), "decoder codec polar research problem" (Expand search), "coder poder solar research problem" (Expand search), "coder poder popular research 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)

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