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