Perhaps you should try some spelling variations:
"based computational complexity coverage problem" » "and computational complexity coverage problem" (Expand search), "by computational complexity coverage problem" (Expand search), "based computational complete coverage problem" (Expand search), "based computational complexity convergence problem" (Expand search), "based computational complexity covering problem" (Expand search), "based computational complexity covering problems" (Expand search), "based computational complexity coverage from" (Expand search)
"using using python python programming" » "using using pythons python programming" (Expand search), "using using piton python programming" (Expand search), "using using pitons python programming" (Expand search), "using usando python python programming" (Expand search), "using in python python programming" (Expand search), "using fusing python python programming" (Expand search), "housing using python python programming" (Expand search), "nursing using 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: (("based computational complexity coverage problem") OR ("using using python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"based computational complexity coverage problem\") OR (\"using using python python programming\"))".
• Removing quotes may allow a broader search: (( based computational complexity coverage problem ) OR ( using using python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("based computational complexity coverage problem") OR ("using using python python programming"))*.