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