Perhaps you should try some spelling variations:
"coder coding string packing problem" » "coder coding string planning problem" (Expand search), "coder coding strip packing problem" (Expand search), "coder coding string matching problem" (Expand search), "coder coding string teaching problem" (Expand search), "coder coding using packing problem" (Expand search), "coder sewing string packing problem" (Expand search), "coder comparing string packing problem" (Expand search), "modern coding string packing problem" (Expand search), "color coding string packing problem" (Expand search), "odor coding string packing 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 coding string packing problem\") OR (\"api python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder coding string packing problem ) OR ( api python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder coding string packing problem") OR ("api python python python programming"))*.