Perhaps you should try some spelling variations:
"based computational and computation program" » "and computational and computation program" (Expand search), "by computational and computation program" (Expand search), "based computational and computational program" (Expand search), "based computational and computational programs" (Expand search), "based computational and compensation program" (Expand search), "based computational fluid computation program" (Expand search), "based computational of computation program" (Expand search)
"advanced simulation grid computer program" » "advanced modulation grid computer program" (Expand search), "advanced calculation grid computer program" (Expand search), "advanced simulation hybrid computer program" (Expand search), "advanced simulation guided computer program" (Expand search), "advanced simulation and computer program" (Expand search), "advanced simulation grids computer program" (Expand search), "advanced simulation grid computing program" (Expand search), "advanced simulation child computer program" (Expand search)

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"based computational and computation program\") OR (\"advanced simulation grid computer program\"))~".
• Removing quotes may allow a broader search: (( based computational and computation program ) OR ( advanced simulation grid computer program ))~.
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