Perhaps you should try some spelling variations:
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"advanced simulation from simplex program" » "advanced modulation 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)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("advanced calculation in constructing program") OR ("advanced simulation from simplex program"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"advanced calculation in constructing program\") OR (\"advanced simulation from simplex program\"))*".
• Removing quotes may allow a broader search: (( advanced calculation in constructing program ) OR ( advanced simulation from simplex program ))*.