Perhaps you should try some spelling variations:
"coder coder complexity posed problems" » "coder code complexity posed problems" (Expand search), "coder model complexity posed problems" (Expand search), "coder lower complexity posed problems" (Expand search), "coder coder complexity based problems" (Expand search), "coder coder complexity bound problems" (Expand search), "coder coder complexity costs problems" (Expand search), "coder coder complexity old problems" (Expand search), "coder coder complexity coupled problems" (Expand search), "coder decoder complexity posed problems" (Expand search), "code code complexity posed problems" (Expand search), "decoder codec complexity posed 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 complexity posed problems") OR ("on python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder complexity posed problems\") OR (\"on python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder complexity posed problems ) OR ( on python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder complexity posed problems") OR ("on python python python programming"))*.