Perhaps you should try some spelling variations:
"lean implementation in computer program" » "an implementation in computer program" (Expand search), "and implementation in computer program" (Expand search), "design implementation in computer program" (Expand search), "lean implementation and computer program" (Expand search), "lean implementation of computer program" (Expand search), "lean implementation _ computer program" (Expand search)
"using using python python programming" » "using using pythons python programming" (Expand search), "using using piton python programming" (Expand search), "using using pitons python programming" (Expand search), "using usando python python programming" (Expand search), "using in python python programming" (Expand search), "using fusing python python programming" (Expand search), "housing using python python programming" (Expand search), "nursing using 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: (("lean implementation in computer program") OR ("using using python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"lean implementation in computer program\") OR (\"using using python python programming\"))".
• Removing quotes may allow a broader search: (( lean implementation in computer program ) OR ( using using python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("lean implementation in computer program") OR ("using using python python programming"))*.