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