Perhaps you should try some spelling variations:
"coder coder persistent concurrent programming" » "coder coder persistent constraint programming" (Expand search), "coder coder persistent current programming" (Expand search), "coder coder persistent currents programming" (Expand search), "coder coder persistent coherent programming" (Expand search), "coder more persistent concurrent programming" (Expand search), "coder or persistent concurrent programming" (Expand search), "coder novel persistent concurrent programming" (Expand search), "coder decoder persistent concurrent programming" (Expand search), "code code persistent concurrent programming" (Expand search), "decoder codec persistent concurrent programming" (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 persistent concurrent programming") OR ("on python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder persistent concurrent programming\") OR (\"on python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder persistent concurrent programming ) OR ( on python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder persistent concurrent programming") OR ("on python python python programming"))*.