Perhaps you should try some spelling variations:
"teaching functions in java programing" » "teaching fractions in java programing" (Expand search), "teaching actions in java programing" (Expand search), "teaching conceptions in java programing" (Expand search), "teaching functions in java programming" (Expand search), "teaching functions in java programs" (Expand search), "teaching functions in meta programming" (Expand search), "teaching functions in japan programing" (Expand search)
"using in python python programming" » "using in pythons python programming" (Expand search), "using in piton python programming" (Expand search), "using in pitons python programming" (Expand search), "using _ 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: "((\"teaching functions in java programing\") OR (\"using in python python programming\"))~".
• Removing quotes may allow a broader search: (( teaching functions in java programing ) OR ( using in python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("teaching functions in java programing") OR ("using in python python programming"))*.