Perhaps you should try some spelling variations:
"_ computational using routing problem" » "_ computation using routing problem" (Expand search), "_ computations using routing problem" (Expand search), "_ computacional usinas routing problem" (Expand search), "_ computational using routine problem" (Expand search), "_ computational nursing routing problem" (Expand search), "_ computational using rotating problem" (Expand search)
"using codigo python python programming" » "using codigo pythons python programming" (Expand search), "using codigo piton python programming" (Expand search), "using codigo pitons python programming" (Expand search), "using indigo python python programming" (Expand search), "using coding python python programming" (Expand search), "using codium 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 using routing problem\") OR (\"using codigo python python programming\"))~".
• Removing quotes may allow a broader search: (( _ computational using routing problem ) OR ( using codigo python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("_ computational using routing problem") OR ("using codigo python python programming"))*.