Perhaps you should try some spelling variations:
"using complex using subsampling program" » "using complex using sampling program" (Expand search), "using complex and subsampling program" (Expand search), "housing complex using subsampling program" (Expand search), "using computer using subsampling program" (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: "((\"using complex using subsampling program\") OR (\"using python python python programming\"))~".
• Removing quotes may allow a broader search: (( using complex using subsampling program ) OR ( using python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("using complex using subsampling program") OR ("using python python python programming"))*.