Perhaps you should try some spelling variations:
"using computation using complex problems" » "using computational using complex problems" (Expand search), "using imputation using complex problems" (Expand search), "using compilation using complex problems" (Expand search), "using computations using complex problems" (Expand search), "using computation in complex problems" (Expand search), "using composition using complex problems" (Expand search), "using computation using complex projects" (Expand search), "using computation housing complex problems" (Expand search), "using computation using computer problems" (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.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"using computation using complex problems\") OR (\"using code from python programming\"))~".
• Removing quotes may allow a broader search: (( using computation using complex problems ) OR ( using code from python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("using computation using complex problems") OR ("using code from python programming"))*.