Perhaps you should try some spelling variations:
"and computation using rostering problem" » "and computations using rostering problem" (Expand search), "and computation in rostering problem" (Expand search), "and composition using rostering problem" (Expand search), "and computation using clustering problem" (Expand search), "and computation using routing problem" (Expand search), "and computation using covering problem" (Expand search), "and computational using rostering problem" (Expand search), "of computation using rostering problem" (Expand search), "and computation using rotating problem" (Expand search), "and computation using resting problem" (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: "((\"and computation using rostering problem\") OR (\"using coding python python programming\"))~".
• Removing quotes may allow a broader search: (( and computation using rostering problem ) OR ( using coding python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("and computation using rostering problem") OR ("using coding python python programming"))*.