Perhaps you should try some spelling variations:
"coder coder _ routing problems" » "coder coder _ routing problem" (Expand search), "coder coder _ solving problems" (Expand search), "coder coder _ packing problems" (Expand search), "coder decoder _ routing problems" (Expand search), "code code _ routing problems" (Expand search), "decoder codec _ routing 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.

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