Perhaps you should try some spelling variations:
"based computation using activity problem" » "based computational using activity problem" (Expand search), "based competition using activity problem" (Expand search), "based compilation using activity problem" (Expand search), "based computations using activity problem" (Expand search), "based computation in activity problem" (Expand search), "based composition using activity problem" (Expand search), "based computation using activity profiles" (Expand search), "based computation using activity program" (Expand search), "based computation using activity profile" (Expand search), "based computation fishing activity problem" (Expand search), "based computation guiding activity problem" (Expand search), "based computation mining activity 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.

• Performing a fuzzy search may retrieve terms with similar spellings: (("based computation using activity problem") OR ("using python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"based computation using activity problem\") OR (\"using python python python programming\"))*".
• Removing quotes may allow a broader search: (( based computation using activity problem ) OR ( using python python python programming ))*.