Perhaps you should try some spelling variations:
"advanced simulation from simplex program" » "advanced modulation from simplex program" (Expand search), "advanced calculation from simplex program" (Expand search), "advanced simulation from simples program" (Expand search), "advanced simulation from complex program" (Expand search), "advanced simulation from simple program" (Expand search), "advanced simulation from simpler program" (Expand search)
"using computational code computing program" » "and computational code computing program" (Expand search), "using computational model computing program" (Expand search), "using computational cost computing program" (Expand search), "using computational models computing program" (Expand search), "using computational code consulting program" (Expand search), "using computational code computer program" (Expand search), "using computational code computador program" (Expand search), "using computational modern computing program" (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 code computing program") OR ("advanced simulation from simplex program"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"using computational code computing program\") OR (\"advanced simulation from simplex program\"))*".
• Removing quotes may allow a broader search: (( using computational code computing program ) OR ( advanced simulation from simplex program ))*.