Perhaps you should try some spelling variations:
"coder coder composition based problems" » "coder code composition based problems" (Expand search), "coder model composition based problems" (Expand search), "coder color composition based problems" (Expand search), "coder coder decomposition based problems" (Expand search), "coder coder compensation based problems" (Expand search), "coder coder composites based problems" (Expand search), "coder coder composition posed problems" (Expand search), "coder coder composition basic problems" (Expand search), "coder coder composition based probes" (Expand search), "coder decoder composition based problems" (Expand search), "code code composition based problems" (Expand search), "decoder codec composition based problems" (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 composition based problems") OR ("on python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder composition based problems\") OR (\"on python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder composition based problems ) OR ( on python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder composition based problems") OR ("on python python python programming"))*.