Perhaps you should try some spelling variations:
"coder coder during obstacle problems" » "coder coder during obstacle problem" (Expand search), "coder coder during scale problems" (Expand search), "coder cover during obstacle problems" (Expand search), "coder powder during obstacle problems" (Expand search), "coder border during obstacle problems" (Expand search), "coder decoder during obstacle problems" (Expand search), "code code during obstacle problems" (Expand search), "decoder codec during obstacle 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 during obstacle problems") OR ("on python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder during obstacle problems\") OR (\"on python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder during obstacle problems ) OR ( on python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder during obstacle problems") OR ("on python python python programming"))*.