Perhaps you should try some spelling variations:
"and python python python programming" » "and pythons python python programming" (Expand search), "and piton python python programming" (Expand search), "and pitons python python programming" (Expand search), "in python python python programming" (Expand search), "on python python python programming" (Expand search), "api python python python programming" (Expand search)
"coder coder robot design problem" » "coder coder robust design problem" (Expand search), "coder coder plot design problem" (Expand search), "coder decoder robot design problem" (Expand search), "code code robot design problem" (Expand search), "decoder codec robot design problem" (Expand search), "coder clever robot design problem" (Expand search), "coder soccer robot design problem" (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 robot design problem") OR ("and python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder robot design problem\") OR (\"and python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder robot design problem ) OR ( and python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder robot design problem") OR ("and python python python programming"))*.