Perhaps you should try some spelling variations:
"based computation using changes problem" » "based computational using changes problem" (Expand search), "based competition using changes problem" (Expand search), "based compilation using changes problem" (Expand search), "based computations using changes problem" (Expand search), "based computation in changes problem" (Expand search), "based composition using changes problem" (Expand search), "based computation using changes problems" (Expand search), "based computation using change problem" (Expand search), "based computation using charged problem" (Expand search), "based computation using charge problem" (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: "((\"based computation using changes problem\") OR (\"usando python python python programming\"))~".
• Removing quotes may allow a broader search: (( based computation using changes problem ) OR ( usando python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("based computation using changes problem") OR ("usando python python python programming"))*.