Perhaps you should try some spelling variations:
"based computation using xor problem" » "based computational using xor problem" (Expand search), "based competition using xor problem" (Expand search), "based compilation using xor problem" (Expand search), "based computations using xor problem" (Expand search), "based computation in xor problem" (Expand search), "based composition using xor problem" (Expand search), "based computation using or problem" (Expand search), "based computation using tour problem" (Expand search), "based computation using or problems" (Expand search), "based computation using xirp problem" (Expand search), "based computation using x problem" (Expand search), "based computation using xml problem" (Expand search)
"using python python python programming" » "using pythons python python programming" (Expand search), "using piton python python programming" (Expand search), "using pitons python python programming" (Expand search), "usando python python python programming" (Expand search), "in python python python 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: "((\"based computation using xor problem\") OR (\"using python python python programming\"))~".
• Removing quotes may allow a broader search: (( based computation using xor problem ) OR ( using python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("based computation using xor problem") OR ("using python python python programming"))*.