Perhaps you should try some spelling variations:
"coder coder and validation problem" » "coder coder and variation problem" (Expand search), "coder coder and calibration problem" (Expand search), "coder coder and realization problem" (Expand search), "coder decoder and validation problem" (Expand search), "code code and validation problem" (Expand search), "decoder codec and validation problem" (Expand search), "coder code and validation problem" (Expand search), "coder codes and validation problem" (Expand search), "coder poder and validation 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 and validation problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder and validation problem\") OR (\"api python python python programming\"))*".
• Removing quotes may allow a broader search: (( coder coder and validation problem ) OR ( api python python python programming ))*.