Perhaps you should try some spelling variations:
"coder coder mapping and problem" » "coder cover mapping and problem" (Expand search), "coder code mapping and problem" (Expand search), "coder border mapping and problem" (Expand search), "coder decoder mapping and problem" (Expand search), "code code mapping and problem" (Expand search), "decoder codec mapping and problem" (Expand search)
"in python python python programming" » "in pythons python python programming" (Expand search), "in piton python python programming" (Expand search), "in pitons python python programming" (Expand search), "_ python python 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 mapping and problem") OR ("in python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder mapping and problem\") OR (\"in python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder mapping and problem ) OR ( in python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder mapping and problem") OR ("in python python python programming"))*.