Perhaps you should try some spelling variations:
"code code complexity parallel programming" » "code code complexity separable programming" (Expand search), "code code complexity paradigm programming" (Expand search), "code code compression parallel programming" (Expand search), "code case complexity parallel programming" (Expand search), "code care complexity parallel programming" (Expand search), "code the complexity parallel programming" (Expand search), "code cdc complexity parallel programming" (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: (("code code complexity parallel programming") OR ("in python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"code code complexity parallel programming\") OR (\"in python python python programming\"))".
• Removing quotes may allow a broader search: (( code code complexity parallel programming ) OR ( in python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("code code complexity parallel programming") OR ("in python python python programming"))*.