Perhaps you should try some spelling variations:
"coder coder control unit problem" » "coder poder control unit problem" (Expand search), "coder encoder control unit problem" (Expand search), "coder poder controle unit problem" (Expand search), "coder coder control using problem" (Expand search), "coder decoder control unit problem" (Expand search), "code code control unit problem" (Expand search), "decoder codec control unit 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.

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