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