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