Perhaps you should try some spelling variations:
"using complexity _ sampling program" » "using complex _ sampling program" (Expand search), "using complete _ sampling program" (Expand search), "design complexity _ sampling program" (Expand search), "using complexity _ labeling program" (Expand search), "using complexity _ smoking program" (Expand search), "using complexity _ jumping program" (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: "((\"using complexity _ sampling program\") OR (\"using coding python python programming\"))~".
• Removing quotes may allow a broader search: (( using complexity _ sampling program ) OR ( using coding python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("using complexity _ sampling program") OR ("using coding python python programming"))*.