Perhaps you should try some spelling variations:
"and computation using nonlinear problem" » "and computations using nonlinear problem" (Expand search), "and computation in nonlinear problem" (Expand search), "and composition using nonlinear problem" (Expand search), "and computation using nonlinear problems" (Expand search), "and computation using linear problems" (Expand search), "and computational using nonlinear problem" (Expand search), "of computation using nonlinear problem" (Expand search), "and computation using linear problem" (Expand search)
"using codigo python python programming" » "using codigo pythons python programming" (Expand search), "using codigo piton python programming" (Expand search), "using codigo pitons python programming" (Expand search), "using indigo python python programming" (Expand search), "using coding python python programming" (Expand search), "using codium 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: (("and computation using nonlinear problem") OR ("using codigo python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"and computation using nonlinear problem\") OR (\"using codigo python python programming\"))".
• Removing quotes may allow a broader search: (( and computation using nonlinear problem ) OR ( using codigo python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("and computation using nonlinear problem") OR ("using codigo python python programming"))*.