Perhaps you should try some spelling variations:
"_ computational root coverage problem" » "_ computational roots coverage problem" (Expand search), "_ computational foot coverage problem" (Expand search), "_ computational cost coverage problem" (Expand search), "_ computational root covering problem" (Expand search), "_ computational root covering problems" (Expand search), "_ computational root coverage from" (Expand search)
"using coding python python programming" » "using codigo python python programming" (Expand search), "using codigos python python programming" (Expand search), "using using python python programming" (Expand search), "using coding pythons python programming" (Expand search), "using coding piton python programming" (Expand search), "using coding pitons python programming" (Expand search), "using coping python python programming" (Expand search), "using coating python python programming" (Expand search), "using cooking 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: "((\"_ computational root coverage problem\") OR (\"using coding python python programming\"))~".
• Removing quotes may allow a broader search: (( _ computational root coverage problem ) OR ( using coding python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("_ computational root coverage problem") OR ("using coding python python programming"))*.