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