Perhaps you should try some spelling variations:
"coder coder active control problem" » "coder coder active control problems" (Expand search), "coder coder active control program" (Expand search), "coder coder adaptive control problem" (Expand search), "coder copper active control problem" (Expand search), "coder power active control problem" (Expand search), "coder under active control problem" (Expand search), "coder decoder active control problem" (Expand search), "code code active control problem" (Expand search), "decoder codec active control 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), "manim 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 active control problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder active control problem\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder active control problem ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder active control problem") OR ("api python python python programming"))*.