Perhaps you should try some spelling variations:
"coder coder implement open problems" » "coder con implement open problems" (Expand search), "coder model implemented open problems" (Expand search), "coder code implementado open problems" (Expand search), "coder coder implementing open problems" (Expand search), "coder coder implement the problems" (Expand search), "coder coder implement an problems" (Expand search), "coder coder implement on problems" (Expand search), "coder decoder implement open problems" (Expand search), "code code implement open problems" (Expand search), "decoder codec implement open problems" (Expand search)
"on python python python programming" » "on pythons python python programming" (Expand search), "on piton python python programming" (Expand search), "on pitons python python programming" (Expand search), "in python pythin python programming" (Expand search), "of python pythof python programming" (Expand search), "_ python pyth_ 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 implement open problems") OR ("on python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder implement open problems\") OR (\"on python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder implement open problems ) OR ( on python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder implement open problems") OR ("on python python python programming"))*.