Perhaps you should try some spelling variations:
"coder decoder kernel routine problems" » "coder decoder kernel routing problems" (Expand search), "coder decoder kernel routing problem" (Expand search), "coder decoder kernel grouping problems" (Expand search), "coder decoder kernel rotting problems" (Expand search), "encoder decoder kernel routine 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), "manim 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 decoder kernel routine problems\") OR (\"api python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder decoder kernel routine problems ) OR ( api python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder decoder kernel routine problems") OR ("api python python python programming"))*.