Perhaps you should try some spelling variations:
"advanced simulation and computer program" » "advanced calculation and computer program" (Expand search), "advanced simulation _ computer program" (Expand search)
"advanced modulation engine computing program" » "advanced calculation engine computing program" (Expand search), "advanced oxidation engine computing program" (Expand search), "advanced simulation engine computing program" (Expand search), "advanced modulation in computing program" (Expand search), "advanced modulation during computing program" (Expand search), "advanced modulation engine consulting program" (Expand search), "advanced modulation engine computador program" (Expand search), "advanced modulation engine computer programs" (Expand search), "advanced modulation online computing program" (Expand search), "advanced modulation edge computing program" (Expand search), "advanced modulation engine combustion program" (Expand search)

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"advanced simulation and computer program\") OR (\"advanced modulation engine computing program\"))~".
• Removing quotes may allow a broader search: (( advanced simulation and computer program ) OR ( advanced modulation engine computing program ))~.
• Adding a wildcard symbol may retrieve word variants: (("advanced simulation and computer program") OR ("advanced modulation engine computing program"))*.