Perhaps you should try some spelling variations:
"based computational in computer program" » "and computational in computer program" (Expand search), "by computational in computer program" (Expand search), "based computational and computer program" (Expand search), "based computational _ computer program" (Expand search), "based computational 3d computer program" (Expand search)
"advanced simulation in convex programming" » "advanced modulation in convex programming" (Expand search), "advanced calculation in convex programming" (Expand search), "advanced simulation in cone programming" (Expand search), "advanced simulation in computer programming" (Expand search), "advanced simulation and convex programming" (Expand search), "advanced simulation non convex programming" (Expand search), "advanced simulation _ convex programming" (Expand search), "advanced simulation of convex programming" (Expand search)

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