Perhaps you should try some spelling variations:
"coder coding using pid controller" » "coder coding using pid controllers" (Expand search), "modern coding using pid controller" (Expand search), "color coding using pid controller" (Expand search), "odor coding using pid controller" (Expand search), "coder modeling using pid controller" (Expand search), "coder drying using pid controller" (Expand search), "coder coding using rapid controller" (Expand search), "coder coding using lipid controller" (Expand search), "coder coding tuning pid controller" (Expand search)
"monty python python python programming" » "monty pythons python python programming" (Expand search), "monty piton python python programming" (Expand search), "monty pitons python python programming" (Expand search)

You may be able to get more results by adjusting your search query.

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