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