Perhaps you should try some spelling variations:
"coder coder coupling some problems" » "coder mode coupling some problems" (Expand search), "coder model coupling some problems" (Expand search), "coder core coupling some problems" (Expand search), "coder coder coupling core problems" (Expand search), "coder coder coupling scheme problems" (Expand search), "coder coder coupling state problems" (Expand search), "coder coder coupling the problems" (Expand search), "coder decoder coupling some problems" (Expand search), "code code coupling some problems" (Expand search), "decoder codec coupling some 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 coupling some problems") OR ("on python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder coupling some problems\") OR (\"on python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder coupling some problems ) OR ( on python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder coupling some problems") OR ("on python python python programming"))*.