Perhaps you should try some spelling variations:
"coder coder pid controller problem" » "coder coder pid control problem" (Expand search), "coder coder pid controller role" (Expand search), "coder coder pid controlled probe" (Expand search), "coder coder pid controllers problem" (Expand search), "coder decoder pid controller problem" (Expand search), "code code pid controller problem" (Expand search), "decoder codec pid controller problem" (Expand search), "coder order pid controller problem" (Expand search), "coder encoders pid controller problem" (Expand search)
"in python python python programming" » "in pythons python python programming" (Expand search), "in piton python python programming" (Expand search), "in pitons python python programming" (Expand search), "_ 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 pid controller problem") OR ("in python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder pid controller problem\") OR (\"in python python python programming\"))*".
• Removing quotes may allow a broader search: (( coder coder pid controller problem ) OR ( in python python python programming ))*.