Perhaps you should try some spelling variations:
"advanced computation in string problem" » "advanced computations in string problem" (Expand search), "advanced computational in string problem" (Expand search), "advance computational in string problem" (Expand search), "advanced computation and string problem" (Expand search), "advanced computation of string problem" (Expand search), "advanced imputation in string problem" (Expand search), "advanced computation in sizing problem" (Expand search), "advanced computation in rostering problem" (Expand search), "advanced computation in sharing problems" (Expand search)
"usando python python python programming" » "usando pythons python python programming" (Expand search), "usando piton python python programming" (Expand search), "usando pitons 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: "((\"advanced computation in string problem\") OR (\"usando python python python programming\"))~".
• Removing quotes may allow a broader search: (( advanced computation in string problem ) OR ( usando python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("advanced computation in string problem") OR ("usando python python python programming"))*.