Perhaps you should try some spelling variations:
"advanced simulation of computational program" » "advanced modulation of computational program" (Expand search), "advanced calculation of computational program" (Expand search), "advanced simulation _ computational program" (Expand search), "advanced simulation and computational program" (Expand search)
"advanced exception in computer program" » "advanced encryption in computer program" (Expand search), "advance perceptions in computer program" (Expand search), "advanced extraction in computer program" (Expand search), "advanced exception _ computer program" (Expand search)

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"advanced exception in computer program\") OR (\"advanced simulation of computational program\"))~".
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