Perhaps you should try some spelling variations:
"the computation using string problem" » "the computations using string problem" (Expand search), "the computation in string problem" (Expand search), "the composition using string problem" (Expand search), "the computational using string problem" (Expand search), "the computation using sizing problem" (Expand search), "the computation using rostering problem" (Expand search), "the computation using sharing problems" (Expand search), "the computation using strong problem" (Expand search), "the computation using spring problem" (Expand search), "the computation using strains 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: "((\"the computation using string problem\") OR (\"using python python python programming\"))~".
• Removing quotes may allow a broader search: (( the computation using string problem ) OR ( using python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("the computation using string problem") OR ("using python python python programming"))*.