Perhaps you should try some spelling variations:
"coder coder learning proposal problem" » "coder coder teaching proposal problem" (Expand search), "coder coder reading proposal problem" (Expand search), "coder coder training proposal problem" (Expand search), "coder coder learning protocol problem" (Expand search), "coder coder learning propositional problem" (Expand search), "coder coder learning proposal process" (Expand search), "coder codes learning proposal problem" (Expand search), "coder modern learning proposal problem" (Expand search), "coder model learning proposal problem" (Expand search), "coder decoder learning proposal problem" (Expand search), "code code learning proposal problem" (Expand search), "decoder codec learning proposal 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 learning proposal problem") OR ("on python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder learning proposal problem\") OR (\"on python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder learning proposal problem ) OR ( on python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder learning proposal problem") OR ("on python python python programming"))*.