Perhaps you should try some spelling variations:
"coder coder creating mooc problems" » "coder co creating mooc problems" (Expand search), "coder code creation mooc problems" (Expand search), "coder after creating mooc problems" (Expand search), "coder coder creating food problems" (Expand search), "coder coder creating music problems" (Expand search), "coder coder creating pools problems" (Expand search), "coder coder creating mpec problems" (Expand search), "coder coder creating smooth problems" (Expand search), "coder coder creating moodle problems" (Expand search), "coder decoder creating mooc problems" (Expand search), "code code creating mooc problems" (Expand search), "decoder codec creating mooc 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 creating mooc problems") OR ("on python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder creating mooc problems\") OR (\"on python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder creating mooc problems ) OR ( on python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder creating mooc problems") OR ("on python python python programming"))*.