Perhaps you should try some spelling variations:
"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)
"coder coding of parallel programming" » "modern coding of parallel programming" (Expand search), "color coding of parallel programming" (Expand search), "odor coding of parallel programming" (Expand search), "coder coding _ parallel programming" (Expand search), "coder decoding of parallel programming" (Expand search), "coder bonding of parallel programming" (Expand search)

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coding of parallel programming\") OR (\"on python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder coding of parallel programming ) OR ( on python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder coding of parallel programming") OR ("on python python python programming"))*.