Perhaps you should try some spelling variations:
"coder coder photon counting problem" » "coder coder photon counting problems" (Expand search), "coder coder photon routing problem" (Expand search), "coder coder photon cutting problem" (Expand search), "coder one photon counting problem" (Expand search), "coder or photon counting problem" (Expand search), "coder over photo counting problem" (Expand search), "coder decoder photon counting problem" (Expand search), "code code photon counting problem" (Expand search), "decoder codec photon counting 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 photon counting problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder photon counting problem\") OR (\"api python python python programming\"))*".
• Removing quotes may allow a broader search: (( coder coder photon counting problem ) OR ( api python python python programming ))*.