Perhaps you should try some spelling variations:
"using computational using modelling problem" » "and computational using modelling problem" (Expand search), "using computation using modelling problem" (Expand search), "using computations using modelling problem" (Expand search), "using computacional usinas modelling problem" (Expand search), "using computational using modelling problems" (Expand search), "using computational using modeling problems" (Expand search), "using computational using covering problem" (Expand search), "using computational using modeling problem" (Expand search), "using computational business modelling problem" (Expand search)
"using code from python programming" » "using code from pathogen programming" (Expand search), "using code from anthony programming" (Expand search), "using cone from python programming" (Expand search), "using co from python programming" (Expand search), "using co2 from python programming" (Expand search), "using code form 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 computational using modelling problem") OR ("using code from python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"using computational using modelling problem\") OR (\"using code from python programming\"))".
• Removing quotes may allow a broader search: (( using computational using modelling problem ) OR ( using code from python programming )).
• Adding a wildcard symbol may retrieve word variants: (("using computational using modelling problem") OR ("using code from python programming"))*.