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