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