Perhaps you should try some spelling variations:
"using perturbations in java programing" » "using perturbation in java programing" (Expand search), "sink perturbation in java programing" (Expand search), "under perturbations in java programing" (Expand search), "using perturbations in java programming" (Expand search), "using perturbations in java programs" (Expand search), "using perturbations in meta programming" (Expand search), "using perturbations in japan programing" (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.

• Performing a fuzzy search may retrieve terms with similar spellings: (("using perturbations in java programing") OR ("using coding python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"using perturbations in java programing\") OR (\"using coding python python programming\"))*".
• Removing quotes may allow a broader search: (( using perturbations in java programing ) OR ( using coding python python programming ))*.