Perhaps you should try some spelling variations:
"coder coder using pulsed problem" » "coder coder using posed problem" (Expand search), "coder coder using posed problems" (Expand search), "coder coder using solved problem" (Expand search), "coder decoder using pulsed problem" (Expand search), "code code using pulsed problem" (Expand search), "decoder codec using pulsed problem" (Expand search), "coder coders using pulsed problem" (Expand search), "coder cover using pulsed problem" (Expand search), "coder code using pulsed 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 using pulsed problem") OR ("on python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder using pulsed problem\") OR (\"on python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder using pulsed problem ) OR ( on python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder using pulsed problem") OR ("on python python python programming"))*.